Dell XPS 15 9520 Powerbank?


newmann,

Let me ask another question:

What is the end goal? Is there something wrong with the adapter that comes with the Dell? Also, what about the power bank? Usually the laptops these days have some rather long runtimes and charge rather rapidly. I'm just curious because it might help in making some informed suggestions.

One of the problems with the power banks is that they tend to be quite heavy for the larger capacity units.
 

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As I said in your question in TenForums, you need to ask the suppliers of your prospective components about compatibility with your computer.
Personally, I think that the Dell USB-C Laptop Power Bank Plus 65 Wh - PW7018LC is the only one you are going to get an authoritative answer about. And the way they write their compatibility lists, you'll probably want to use their Contact us button in the bottom right corner to get confirmation.

Denis
 

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Denis did a great job summing this up. My long-winded response hopefully impressed upon you the need to be cautious and verify compatibility, but Denis did a far better job just cutting to the chase.
 

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Sorry, one more thought:

If you do find a compatible power bank with USB-C as the input, you should just be able to use the USB-C adapter that comes with the Dell to charge it. You likely will not even need another adapter. In other words, that same adapter could be used with either your power bank or the laptop.
 

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Let me see if I can help demystify this a bit.

Let me start by apologizing for the length of this post. There is a lot to cover, so if I confuse you, please feel free to ask questions!

The first thing you need to be keenly aware of is that up until EXTREMELY recently, a 130W USB-C adapter was considered "non-standard". Let me explain....

Laptops that use USB-C power connections are very different from laptops that use a barrel connector. On laptops using a barrel connector, all that matters is that the AC adapter has the right voltage and that it can put out sufficient current to satisfy the needs of the laptop. With USB-C, there is a lot more involved. Yes, the AC adapter has to also support the correct voltage and have sufficient power output, but the adapter that you are using must support the PD or "Power Delivery" protocol. Put another way, a USB-C power adapter can typically output multiple different voltages such as 5V, 9V, 15V, and 20V. When you plug that adapter into the laptop, it uses the PD protocol to communicate back and forth between the adapter and the notebook to negotiate the voltage that will be used.

You can purchase AC adapters that can output different amounts of power. Some might support something like 20W or 30W. These are typically used for smaller devices like phones. For laptops, the typical chargers are 65W, or 90W, 100W. If you use an adapter with a lower wattage rating it MAY work, but it obviously charge the battery more slowly. For a laptop that is very busy, drawing near peak power it's possible that using an underpowered charger may not keep up with the amount of power being drawn by the laptop, in which case it simply will not charge, or it may charge very slowly.

Let me give you an example:

I have an HP laptop. The original USB-C charger for it was a 90W charger. It died. I started using a 65W adapter with that laptop, and it worked fine, it just took longer to charge.

Now, here is another wrinkle. Remember that we said that the USB-C adapter should be capable of supplying enough power to the laptop. With USB-C you also need to make sure that the cable is capable of delivering enough power! Yes, that's right, the USB-C cables have a chip built into them, known as an e-marker, that communicates with the charger and tells it how much power it is capable of delivering. These cables are typically rated for either 65W or 100W.

So, let's use another example: I have my HP laptop and a USB-C charger that is capable of delivering 100W of power. I connect the charger and the laptop with a cable capable of 65W. This means that even though my charger is capable of delivering 100W, the most power that will ever be sent to the laptop is 65W.

Now, we introduce yet one more layer of complexity: Up until EXTREMELY recently, the USB-C power delivery (PD) spec only allowed for 100W max. The brand new PD 3.1 spec allows for up to 240W but you need cables and chargers capable of this. How new is this standard? The very first products to support this standard are only just now hitting the market.

So, the fact that Dell is using a 130W adapter makes me a little worried that it may potentially be proprietary. My guess is that a 90W or 100W charger / cable will probably work fine, but I would urge caution.

Since you are working with something that has the potential to be non-standard, you might want to inquire directly with Dell about this. You could also check with the Manufacturer of USB-C power adapters since they test their adapters with literally hundreds of devices. In particular, I would suggest checking with the company "Anker". They sell more USB-C adapters than probably anyone else and they should be able to tell you what works with your laptop.

As for the barrel to USB-C adapter you are looking at, I would not suggest it. It is rated for only 65W max, so, if it works at all it would be slow and a sub-optimal experience.

Same is true for the that power bank you were looking at.

Once again, Anker makes power banks that can supply a lot more power - I just got their latest yesterday that can supply 140W of power.

As for the maximum size of a power bank allowed on a plane, you are looking for a rating or 100WHh or less. Note that this is a different value than the number of watts that the adapter can supply.

Example: The Anker power bank I referenced can supply up to 140W, but the capacity it something like 89Wh, which is under the max allowable of 100Wh. Note that if the manufacturer does not supply a rating in Wh, look for a rating in terms of "mAh". The max allowable for this value is just over 27,000 mAh.

I realize that I'm throwing a lot of info at you, so please ask questions if you have any.
Thanks for this very long response.

Isn't my old Dell XPS 15 9550 with the older barrel powerbank PW7015 pretty much exactly the same when you compare it to the new Dell XPS 9520 with the usb-c powerbank PW7018LC? First off, both of these laptops charger is 130W by default... correct? I took a look at both and they are literally same size and everything. The only difference is the older charger is connected via barrel... the newer laptop is my usb-c. You did say the usb-c laptop charger is considered nonstandard which make sense since it is new.


Now with both PW7018L and PW7015LC, aren't both going to draw the max of 65W? I know when I used the PW7015L with my old xps 15 9550, it first gives a warning message that it can only do 65W. But that is already mentioned in the instruction booklet so there is no issue with that. So if it is the same with the PW7015LC with the new xps 15 9520, then using that powerbank is literally the same as my old laptop with old barrel powerbank right?


What you are now saying is even I buy an adapter that allows me to use the old barrel size PW7015L with the newer usb-c dell xps 15 9520 laptop, there might be volt differences where the power doesn't supply correctly? Is that what you mean? However, isn't that dell cable exactly what it is meant for? So if you could buy that cable, it would be fine? Or you say it is not good idea to use that? But you do say avoid any other 3rd party non dell adapters that would allow me to use these barrel powerbanks with the new xps 15 9520?


Which anker powerbank do you have? Can you post a link?


The last thing I want is to cause any issues with my new laptop. So the safest thing is just get the PW7018LC for it since it is meant for it? However you seem to support anker... but how would i know it works for it? Any issues with the anker causing damage with the xps?


So the safer play would be the Dell PW7018LC that is usb-c then right? Then it would be that dell adapter. Then anker. And finally any other 3rd party powerbank?
 

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Isn't my old Dell XPS 15 9550 with the older barrel powerbank PW7015 pretty much exactly the same when you compare it to the new Dell XPS 9520 with the usb-c powerbank PW7018LC?
No, no, no, no, no.
The USB-C connection is doing a lot more than passively cause an electrical connection, which is all the barrel connector did.
The USB-C connection is actively exchanging information with the laptop.



So the safest thing is just get the PW7018LC for it since it is meant for it?
Have you checked compatibility with Dell?


Denis
 

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newmann,

Let me ask another question:

What is the end goal? Is there something wrong with the adapter that comes with the Dell? Also, what about the power bank? Usually the laptops these days have some rather long runtimes and charge rather rapidly. I'm just curious because it might help in making some informed suggestions.

One of the problems with the power banks is that they tend to be quite heavy for the larger capacity units.
My goal is to use my laptop with enough battery backup in case of a power outage. Where I am located, we occasionally get power outages. Years ago this happened a lot and when this happened it could be for few hours and my laptop didn't have enough battery for this. When I use my laptop, I do intensive things on it... so the battery isn't going to last 5 hours etc. It last 2 hours at the most probably.


So years ago, I bought 2 PW7015L powerbanks. I also bought a Cyberpower UPS 1500VA as well. So in case of power outage, say I have 2 hours on my laptop battery. I could get 1.5 hours on each powerbank so 3 hours total. Then I assume the UPS I could probably get 2 hours. So that is 7 hours of battery backup which is more than enough usually. Now after I bought all this, I did not have 1 situation where I had a power outage... and it lasted more than few hours. So just my laptop battery and 1 PW7015L was enough for this.


But now that I got a new xps 15 9520, that means my 2 PW7015 powerbanks are useless. Not only that, my Cyberpower UPS no longer works. I am pretty sure battery is no good anymore. The thing was I rarely ever powered the UPS on... i just left it plugged in wall outlet and that was it. But earlier, I even had it unplugged for a month or so from the outlet so most likely I damaged the battery that way?


So at the moment, the only battery backup I have is my new laptop battery. I assume I could get max 3 hours on it the absolute most since I do intensive things on it.


So I want a few more hours of battery backup which is why I ask about powerbank for this new xps 9520. I also don't want to spend a ton of money either. So that is why I thought hey that dell adapter cost $40+ tax only. I buy that and now can i use my 2 PW7015L powerbanks and that is good enough. I could also buy a new battery for my old UPS and that would be more than enough battery.


Someone suggested best solution is that Dell PW7018LC. It cost $150+tax. So that seem to be the simplest way then? I buy most likely 1... not going to buy 2 of them.
 

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Sorry, one more thought:

If you do find a compatible power bank with USB-C as the input, you should just be able to use the USB-C adapter that comes with the Dell to charge it. You likely will not even need another adapter. In other words, that same adapter could be used with either your power bank or the laptop.
Are you saying I wouldn't need the xps 15 9550 laptop charger to charge the barrel PW7015L powerbanks? I still need them right? If i wanted to charge my 2 PW7015L powerbanks, you have to plug it with the barrel into either the xps 15 9550 charger/


But that cable means you wouldn't need that xps 9550 charger anymore?
 

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No, no, no, no, no.
The USB-C connection is doing a lot more than passively cause an electrical connection, which is all the barrel connector did.
The USB-C connection is actively exchanging information with the laptop.




Have you checked compatibility with Dell?


Denis
Okay so the usb-c connection does more things. So you are saying any non dell brand powerbank is bad for this and stick with dell? That is what did with my old xps 15 9550 with the PW7015L and it worked fine with it. I just find it frustrating these 2 PW7015L powerbanks are useless now for me if I can't use it with a new xps and have to buy new ones...


I didn't check with dell. Do you live chat with them for this information? I do see in the Q and A... one comment said yes another said no. It works with the dell xps 9500 which is an older version of this and usb-c.. so shouldn't it have to work?
 

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1 No
2 I have already told you that.
3 I assume that was rhetorical.

Denis
 

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1 No
2 I have already told you that.
3 I assume that was rhetorical.

Denis
Thanks for the response. Okay so seems the PW7018LC is the best option for this but I got a few questions.



1. It seems to draw 65W just like my old PW7015L. Now the xps 9520 uses a 130W charger. But this is not an issue right? I also read someone mention that the 9520 requires a minimum of 90W? Do you know anything about this? Does this mean it might not work? Or it works but it wouldn't be as strong? I heard this compatible with the 9520 but what about the minimum watt?


I mean my old xps 9550 laptop also had a 130W charger so this is essentially the same with the PW7018LC with the new xps 9520 or not? But did the xps 9550 require a lower amount of watt?



2. I notice there are other powerbanks like the anker 737 that is 24000mah and draws 140W. Now this is more than the dell pw7018lc that is 18000mah and draws 65W.




Does this mean this would work better than the dell because it draws 140W... since the dell charger is 130W and thus more powerful? However, I did read a comment where if it draws 140W, then it would charge for only 37 minutes?


So with the dell pw7018lc, because it draws 65w only, it would charge longer? Because with the old xps 9550 with the old PW7015L, I remember when I was charging it while using it, it charged for more than 1.5 hours before it went out. This was while using the old xps 9550.



3. With the anker 737, could you make the xps 9520 draw less wattage? Thus that way it would charge more or is that not possible? I know every laptop draws a different amount of watts but can you make a laptop draw less watts so it last longer?



4. I heard dell xps laptop limit the amount of watt usage by 3rd party powerbanks. Do you or anyone else know about this?
 

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Denis did a great job summing this up. My long-winded response hopefully impressed upon you the need to be cautious and verify compatibility, but Denis did a far better job just cutting to the chase.
From checking, it seem the PW7018LC is compatible with the new xps 15 9520.

But do you have any opinion about the last few questions I have with the watts?
 

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From checking, it seem the PW7018LC is compatible with the new xps 15 9520.

But do you have any opinion about the last few questions I have with the watts?
The big problem is that I don't know what the minimum acceptable wattage for your laptop would be.

For my own laptop, I was able to experiment because I have a lot of USB-C chargers (probably 30+ USB chargers, I like to experiment). My original charger from HP is a 90W unit, but I found that any charger down to 45W seems to work. However, at that level, it charges slowly, and if under heavy load may actually loose charge slowly.

So, in my opinion, the closer to the rating of the original charger (or greater) that you can get, the better.

Question: I had noted before that you might be able to use your original Dell charger with a power bank. Let me expand upon that a little bit with an example...

I have a power bank that works with laptop. Assume that I use the power bank to charge the laptop and the power bank now has only 50% of its charge. I'm now back near an AC outlet but have only one charger with me. Since my power bank supports "pass thru" charging I do this: I plug the power bank into my laptop, and my USB-C wall charger into the power bank. The end result is that the power from my wall charger gets "passed thru" to the laptop, charging it, but any additional power available from the wall charger charges the power bank at the same time.

As a result, it can be super helpful to use a power bank that has the pass thru charging capability. That's also why I said that you might simply be able to use your original charger from Dell without the need for another one.
 

My Computers

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  • OS
    Win11 Pro 23H2
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    PC/Desktop
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    Home Built
    CPU
    Intel i7-11700K
    Motherboard
    ASUS Prime Z590-A
    Memory
    128GB Crucial Ballistix 3200MHz DRAM
    Graphics Card(s)
    No GPU - CPU graphics only (for now)
    Sound Card
    Realtek (on motherboard)
    Monitor(s) Displays
    HP Envy 32
    Screen Resolution
    2560 x 1440
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    1 x 1TB NVMe Gen 4 x 4 SSD
    1 x 2TB NVMe Gen 3 x 4 SSD
    2 x 512GB 2.5" SSDs
    2 x 8TB HD
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    Corsair HX850i
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    Additional options installed:
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    ASUS ThunderboltEX 4 PCIe adapter
  • Operating System
    Win11 Pro 23H2
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo ThinkBook 13x Gen 2
    CPU
    Intel i7-1255U
    Memory
    16 GB
    Graphics card(s)
    Intel Iris Xe Graphics
    Sound Card
    Realtek® ALC3306-CG codec
    Monitor(s) Displays
    13.3-inch IPS Display
    Screen Resolution
    WQXGA (2560 x 1600)
    Hard Drives
    2 TB 4 x 4 NVMe SSD
    PSU
    USB-C / Thunderbolt 4 Power / Charging
    Mouse
    Buttonless Glass Precision Touchpad
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    Backlit, spill resistant keyboard
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    WiFi 6e / Bluetooth 5.1 / Facial Recognition / Fingerprint Sensor / ToF (Time of Flight) Human Presence Sensor
The big problem is that I don't know what the minimum acceptable wattage for your laptop would be.

For my own laptop, I was able to experiment because I have a lot of USB-C chargers (probably 30+ USB chargers, I like to experiment). My original charger from HP is a 90W unit, but I found that any charger down to 45W seems to work. However, at that level, it charges slowly, and if under heavy load may actually loose charge slowly.

So, in my opinion, the closer to the rating of the original charger (or greater) that you can get, the better.

Question: I had noted before that you might be able to use your original Dell charger with a power bank. Let me expand upon that a little bit with an example...

I have a power bank that works with laptop. Assume that I use the power bank to charge the laptop and the power bank now has only 50% of its charge. I'm now back near an AC outlet but have only one charger with me. Since my power bank supports "pass thru" charging I do this: I plug the power bank into my laptop, and my USB-C wall charger into the power bank. The end result is that the power from my wall charger gets "passed thru" to the laptop, charging it, but any additional power available from the wall charger charges the power bank at the same time.

As a result, it can be super helpful to use a power bank that has the pass thru charging capability. That's also why I said that you might simply be able to use your original charger from Dell without the need for another one.
Hi. Yes that is the main concern here with not knowing what the minimum acceptable wattage should be. Where would I even find this information or would I need to test it myself? I read someone mentioned 90W is the minimum for the 9520 but I am not sure where that person found that information and if that is true or not. So if that is true, then that mean this Dell PW7018LC with 65W wouldn't even charge at all then and not compatible?

I have no issue with it working but it charging slowly. I am pretty sure that is how it was with my old xps 9550 with the old barrel PW7015L. I think when it was heavy load, it charged slow but to me I have no issue with that.

Well the dell usb-c charger is 130W. This PW7015L is 65W so half of that. That isn't close at all. But this is the exact same with my xps 9550 and the PW7015L correct? However, this new laptop charging 130W being USB-C compared to the regular barrel is the big issue here right?

Well with my old xps 9550 charger, I have absolutely no use for it anymore... unless I was able to have gotten that dell adapter which would allow me to to use my old 2 PW7015L barrel power banks to charge it. But if I was able to get that dell adapter that is out of stock, did I still need the xps 9550 laptop charger to charge the 2 PW7015L powerbanks or could I use use my new laptop usb charger?

So you are saying, with that dell adapter that is out of stock... had i gotten that... i could charge my new 9520 laptop with it... also use it to charge the old barrel PW7015L powerballs.. and i could literally just leave the new 9520 laptop charger in the closet? Of course the dell adapter is out of stock so I can't do any of this.
 

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So what is my best option now?


1. Dell PW7018LC 65W 18000mah


2. Anker 737 140W 24000mah



3. Sunjack 100W 25600mah




If you had to buy 1 of them, which would you choose? Dell seems the best one because it Dell brand but the 65W might be a concern with the xps 9520 because it might need minimum of 90W to work? Again I do not mind if it slow charge because that happened with my old xps 9550 with the barrel PW7015L.


The anker 737 shows 140W. Is this the exact anker you have? But dell isn't going to allow it to draw 140W because it is 3rd party and max probably would be 90W or 65W? But let say it can go 140W. Wouldn't that mean the battery would be very bad? Someone I read commented that it would last only 37 minutes with it. But I have no idea where they got that number from and if true or not. But could you use this and make it draw 65W so it last longer? Or whatever watts a laptop draws... it is always that ? Thus you can't choose?


The sunjack seem to have the decent W at 100W and most mah. So this would also be a very good option because even if it draws 90W or 100W max with the xps, that would be good enough? However, this is another 3rd party powerbank.
 

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Let me try to clarify this a bit...

Let's use an example to explain some of the terms.

Suppose you have a bucket full of water and a hose that you can use to siphon off water from that bucket. The size of the bucket determines how much water you have available in total. If you have a 10 gallon bucket, you obviously have twice as much water available as with a 5 gallon bucket. Meanwhiloe, the hose determines how quickly you can deliver water.

In electrical terms, the mAh (milliamp hour) rating or Wh (Watt Hours) ratings are like the bucket. This is how much total power the power bank has available.

The number of watts that the power bank can deliver is like the hose. With a small diameter hose, you can deliver only a small amount of water during any given time period. Let's say that it takes 2 minutes to drain the entire bucket. But if you use a larger diameter hose, it can drain that bucket in only 1 minute.

Likewise with the wattage rating of the power bank. A power bank rated for 140W can potentially deliver the available power from the power bank much faster than a power bank rated for 65W output.

Now, let's assume that you connect a laptop to your power bank that only draws 65W and your power bank has the ability to deliver 140W. This would be like having a hose with a faucet attached to it. Maybe the hose has the ability to supply 1 gallon of water every minute, but you have the faucet only open to the point where half a gallon is being delivered every minute.

Put another way, if the power bank can deliver 140W of power but the laptop only draws 65W, you simply have extra capacity available should you need it, so it's like running with the faucet only partially open.

To summarize a little:

If you have a power bank that has a rating of x number of Wh (Watt hours) or x number of mAH (milliamp hours) this implies that it can draw that number of watts or milliamps for a period of one hour. If you draw only half that number of watts or milliamps, it can do that for 2 hours, etc.

So, to answer one of your questions: Yes, drawing a higher number of watts means that you will drain the power bank faster, but you have still delivered the same amount of total energy. It's like the bucket and hose. You may drain the bucket much faster with a bigger hose, but you still ended up delivering the same amount of water.

Now we get to recommendations. I have a hard time doing that only because I have no experience with the brands you list other than Anker. What I can say is that I do have a lot of experience with Anker. In my opinion, they make very high quality equipment and their customer is generally known to be excellent.

I hope that all this helps rather than to make things even more confusing! Do feel free to ask more questions if anything is not clear.
 

My Computers

System One System Two

  • OS
    Win11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-11700K
    Motherboard
    ASUS Prime Z590-A
    Memory
    128GB Crucial Ballistix 3200MHz DRAM
    Graphics Card(s)
    No GPU - CPU graphics only (for now)
    Sound Card
    Realtek (on motherboard)
    Monitor(s) Displays
    HP Envy 32
    Screen Resolution
    2560 x 1440
    Hard Drives
    1 x 1TB NVMe Gen 4 x 4 SSD
    1 x 2TB NVMe Gen 3 x 4 SSD
    2 x 512GB 2.5" SSDs
    2 x 8TB HD
    PSU
    Corsair HX850i
    Case
    Corsair iCue 5000X RGB
    Cooling
    Noctua NH-D15 chromax.black cooler + 10 case fans
    Keyboard
    CODE backlit mechanical keyboard
    Mouse
    Logitech MX Master 3
    Internet Speed
    1Gb Up / 1 Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    Additional options installed:
    WiFi 6E PCIe adapter
    ASUS ThunderboltEX 4 PCIe adapter
  • Operating System
    Win11 Pro 23H2
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo ThinkBook 13x Gen 2
    CPU
    Intel i7-1255U
    Memory
    16 GB
    Graphics card(s)
    Intel Iris Xe Graphics
    Sound Card
    Realtek® ALC3306-CG codec
    Monitor(s) Displays
    13.3-inch IPS Display
    Screen Resolution
    WQXGA (2560 x 1600)
    Hard Drives
    2 TB 4 x 4 NVMe SSD
    PSU
    USB-C / Thunderbolt 4 Power / Charging
    Mouse
    Buttonless Glass Precision Touchpad
    Keyboard
    Backlit, spill resistant keyboard
    Internet Speed
    1Gb Up / 1Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    WiFi 6e / Bluetooth 5.1 / Facial Recognition / Fingerprint Sensor / ToF (Time of Flight) Human Presence Sensor
Let me try to clarify this a bit...

Let's use an example to explain some of the terms.

Suppose you have a bucket full of water and a hose that you can use to siphon off water from that bucket. The size of the bucket determines how much water you have available in total. If you have a 10 gallon bucket, you obviously have twice as much water available as with a 5 gallon bucket. Meanwhiloe, the hose determines how quickly you can deliver water.

In electrical terms, the mAh (milliamp hour) rating or Wh (Watt Hours) ratings are like the bucket. This is how much total power the power bank has available.

The number of watts that the power bank can deliver is like the hose. With a small diameter hose, you can deliver only a small amount of water during any given time period. Let's say that it takes 2 minutes to drain the entire bucket. But if you use a larger diameter hose, it can drain that bucket in only 1 minute.

Likewise with the wattage rating of the power bank. A power bank rated for 140W can potentially deliver the available power from the power bank much faster than a power bank rated for 65W output.

Now, let's assume that you connect a laptop to your power bank that only draws 65W and your power bank has the ability to deliver 140W. This would be like having a hose with a faucet attached to it. Maybe the hose has the ability to supply 1 gallon of water every minute, but you have the faucet only open to the point where half a gallon is being delivered every minute.

Put another way, if the power bank can deliver 140W of power but the laptop only draws 65W, you simply have extra capacity available should you need it, so it's like running with the faucet only partially open.

To summarize a little:

If you have a power bank that has a rating of x number of Wh (Watt hours) or x number of mAH (milliamp hours) this implies that it can draw that number of watts or milliamps for a period of one hour. If you draw only half that number of watts or milliamps, it can do that for 2 hours, etc.

So, to answer one of your questions: Yes, drawing a higher number of watts means that you will drain the power bank faster, but you have still delivered the same amount of total energy. It's like the bucket and hose. You may drain the bucket much faster with a bigger hose, but you still ended up delivering the same amount of water.

Now we get to recommendations. I have a hard time doing that only because I have no experience with the brands you list other than Anker. What I can say is that I do have a lot of experience with Anker. In my opinion, they make very high quality equipment and their customer is generally known to be excellent.

I hope that all this helps rather than to make things even more confusing! Do feel free to ask more questions if anything is not clear.
Hey thanks for that long response. So what you are saying is this.


A powerbank that Has 24000 mah and can draw up to 140W and does draw 140W on an xps 9520 if indeed it does...will most likely have all the battery used up faster than another powerank with 18000mah and draws 65W correct? This is assuming the laptop could actually draw the 140W?


But is that powerbank with 24000mah releasing more power than if it is drawing 140W to the laptop? You say yes but what if you don't want it to drain that much W if lesser still works?


With the old xps 9550 and the old barrel PW7015, I recall I could charge it for 1.5 hours or a bit more before the powerbank went out of power.


But if the anker has 24000 mah and can draw up to 140W... let say when connected to the xps 15 9520, it draws 90W only... or it could be 140W or even as low as 65W... do you as the user has the option to change the drawing watt amount to lower whatever it is? Thus if it shows 140W or 90W, can you make it go to 65W to get more charge of the anker?
 

My Computer

System One

  • OS
    Windows 11 Pro
So, the number of watts is how much power can be delivered at any given moment. If a power bank is capable of delivering 100W that means that the maximum amount of power that it can supply at any given moment is 100W. Your laptop will determine how much power it wants to draw. Let's say that your laptop wants 100W of power from the power bank. Even if your power back could deliver 1,000W, 2,000W, heck, 1,000,000W, your laptop is still only going to draw 100W. Having a power bank that can offer a higher wattage is simply excess at that point or it can allow you to charge additional devices at the same time.

Note that you have no direct control over how much power the laptop wants. Do bear in mind that a laptop does not draw a constant amount of power. If it just idling it's going to draw a lot less power than if you are doing heavy computing. Likewise, a very bright screen setting will draw more power than dim settings, etc.
 

My Computers

System One System Two

  • OS
    Win11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-11700K
    Motherboard
    ASUS Prime Z590-A
    Memory
    128GB Crucial Ballistix 3200MHz DRAM
    Graphics Card(s)
    No GPU - CPU graphics only (for now)
    Sound Card
    Realtek (on motherboard)
    Monitor(s) Displays
    HP Envy 32
    Screen Resolution
    2560 x 1440
    Hard Drives
    1 x 1TB NVMe Gen 4 x 4 SSD
    1 x 2TB NVMe Gen 3 x 4 SSD
    2 x 512GB 2.5" SSDs
    2 x 8TB HD
    PSU
    Corsair HX850i
    Case
    Corsair iCue 5000X RGB
    Cooling
    Noctua NH-D15 chromax.black cooler + 10 case fans
    Keyboard
    CODE backlit mechanical keyboard
    Mouse
    Logitech MX Master 3
    Internet Speed
    1Gb Up / 1 Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    Additional options installed:
    WiFi 6E PCIe adapter
    ASUS ThunderboltEX 4 PCIe adapter
  • Operating System
    Win11 Pro 23H2
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo ThinkBook 13x Gen 2
    CPU
    Intel i7-1255U
    Memory
    16 GB
    Graphics card(s)
    Intel Iris Xe Graphics
    Sound Card
    Realtek® ALC3306-CG codec
    Monitor(s) Displays
    13.3-inch IPS Display
    Screen Resolution
    WQXGA (2560 x 1600)
    Hard Drives
    2 TB 4 x 4 NVMe SSD
    PSU
    USB-C / Thunderbolt 4 Power / Charging
    Mouse
    Buttonless Glass Precision Touchpad
    Keyboard
    Backlit, spill resistant keyboard
    Internet Speed
    1Gb Up / 1Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    WiFi 6e / Bluetooth 5.1 / Facial Recognition / Fingerprint Sensor / ToF (Time of Flight) Human Presence Sensor
So, the number of watts is how much power can be delivered at any given moment. If a power bank is capable of delivering 100W that means that the maximum amount of power that it can supply at any given moment is 100W. Your laptop will determine how much power it wants to draw. Let's say that your laptop wants 100W of power from the power bank. Even if your power back could deliver 1,000W, 2,000W, heck, 1,000,000W, your laptop is still only going to draw 100W. Having a power bank that can offer a higher wattage is simply excess at that point or it can allow you to charge additional devices at the same time.

Note that you have no direct control over how much power the laptop wants. Do bear in mind that a laptop does not draw a constant amount of power. If it just idling it's going to draw a lot less power than if you are doing heavy computing. Likewise, a very bright screen setting will draw more power than dim settings, etc.
Okay thanks for that information. But the Dell PW7018LC should be a safe choice then right?

Even if it draws 65W as that is the default, it should have no issues at all when connecting it to laptop when using the laptop? Again I don't mind slow charge as I know that will already happen.
 

My Computer

System One

  • OS
    Windows 11 Pro
Once again, you expect us to put ourselves out to help you but you won't get off your butt for five minutes to help yourself.

I have told you who to ask, I have told you what method to use to get in contact with them. They should answer all your questions about the PW7018LC.


Backup Power Options for Laptop When Power Outage? - ElevenForum [started 14th October 2022]
Dell XPS 15 9520 Powerbank - ElevenForum [this one, started 12th October 2022]
Dell XPS 9520 Powerbank Options - BCForum [started 11th October 2022]
PW7015L Power Companion With Dell XPS 9510/9520 - TenForums [started 31st August 2022]
And you kept repeating the same questions in similarly interminable threads such as Battery Backup For Laptop When Power Outage? - TenForums [4th October 2018 - 1st October 2019]



Denis
 

My Computer

System One

  • OS
    Windows 11 Home x64 Version 23H2 Build 22631.3296

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