Cyberpower UPS Battery Replacement?

I bought this UPS many years ago. The battery has been dead for a few years now and I use it as a surge protector for electronics. That includes a laptop and 2 external monitors. One is 32' 4k monitor and a 24' 1920x1200 monitor. It's plugged into the wall outlet.


The moment a power outage happens or if I unplug it from the wall, it immediately powers off. Several times it would just power off by itself and sometimes a few times within a short time. I want to get replacement batteries for it because the moment a power outage happens, I want to be able to continue using my laptop and monitors for a bit until it runs out of battery. I think I might be able to get 1 hour of backup on it at the most but at least 30 minutes right? I read some people say you could buy a new UPS or buy replacement batteries for it. I'm currently outside of the US now but they do sell these 2 products below on the Amazon where I'm located now. I'm posting the Amazon US site for reference.


The OEM Cyberpower battery costs $52 each so a total of $104. The Mighty Max battery seems to cost half the price so about $27.50 each and $55 total. Now this UPS requires 2 batteries correct and it has to be 12V/9Ah?

CyberPower RB1290 UPS Replacement Battery Cartridge, Maintenance-Free, User Installable, 12V/9Ah​

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About $52 each so total of $104. However, it would cost about $68 each so total of $136 total where I'm located.​

ML9-12 - 12 Volt 9 AH, F2 Terminal, Rechargeable SLA AGM Battery,Pack of 1​

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About $27.50 each so total of $55.​

Has anyone bought either of these brands and are they similar? It's the same Volt and Ah. Obviously OEM is better and costs more. But is mighty max battery a good alternative? I read mixed reviews on this brand. Would this battery have a lower runtime than the OEM Cyberpower?


Now if I was to buy a brand new UPS the same one I bought years ago, it would cost almost $300 where I'm located. If I buy replacement batteries, it would cost higher for the Cyberpower one at $68 each so $136 total. Or the mighty max battery is $27.50 each so $55 total. The other thing is I'm not sure how to install it. Does anyone have a clue how much it would cost for a repair shop to open the UPS and replace the batteries? I'm not in the US now and the cost of this service should be less than in the US. I got to assume it would cost $50 or so at least for a computer store to install replacement UPS batteries for you assuming you provide them with the battery in the US?


My concern is if I install it myself, what things can go wrong if you don't do it correctly? I read of cases where smoke and things like that can happen? So if you don't know how to install replacement batteries, you should go to a computer store for them to do it?

I have been using the "off-brand" batteries in all my UPS boxes (five of them) whenever they need them. I had a Cyberpower 1500 VA UPS on my main and backup system configuration, and I've had a similar Cyberpower UPS for years. My old CyberPower CP1285AVRLCD finally croaked after over ten years of service and two battery replacements, something internally died. The replacement batteries lasted about the same four years as the original batteries, when it finally died, it still had good batteries. My current CyberPower CP1500PFCLCD PFC Sinewave UPS has been in service for about 18 months, and when it needs batteries, I'll be using 3rd party batteries for it as well.

My other smaller UPS boxes also receive 3rd party batteries when they need them.

Installing the batteries is a ten minute affair, I've never run across a UPS that it wasn't quite easy to swap the batteries. Here you go, a three minute video for your unit. Most of the video is how to test the installation after the install, the batteries are very easy.

What off brand did you buy? Did you use mighty max or another brand?


The thing is if you are not good at something like this, is it possible to do it wrong? My concern is if I unplug it wrong or install it wrong or something goes wrong.

Well, truthfully, it's very simple. However, one fact does remain, it's possible to screw up almost anything and cause bigger problems, that is true in all walks of life.

I've purchased several brands over the years for various UPS systems, all worked pretty much the same.

Replacement Batteries for CyberPower CP1285AVRLCD Set of 2

Mighty Max Battery 12V 8AH Replacement Battery for CyberPower Office Power AVR 685AVR

The thing is you need a screwdriver to open the UPS. Then you remove the 2 batteries from the UPS and put the 2 new batteries into it the same way right? The thing is could you mess up somehow if you don't know what you are doing? Could the battery somehow leak out? Do you need to wear gloves when doing something like this? You say it can?


My concern is if you install it wrong or something like that, could it cause an explosion or something coming out of the battery?


My concern would be when taking out the UPS battery, could you damage it somehow when removing it or putting the new one in. For example, I did open an older xps laptop up a while back and replaced the battery with it with a new one but it was not that simple. I was concerned if I could damage it somehow. Like imagine you replace RAM on a laptop or desktop and if you do it wrong, you could damage the RAM right? So that is my concern with installing the UPS battery.


Okay so you bought Cyberpower OEM and Mighty Max. Did you buy any other brands or only these? So you find Cyberpower and Mighty Max pretty much the same then?


Did you ever do a test to check how long your Cybepower 1500 VA last? Like if you use it for a laptop, how long did it last before UPS went from 100% to 0%. Of course it depends on how much watts your laptop draw. Xps 15 9520 would draw 65-130 watts with average around 90 watts? If monitor draws 59 watts, how much would the UPS last?

I'll freely admit, I've never "life tested" the replacement batteries, or for that matter, the original batteries. I have run the UPS on my full load for half an hour to make sure it'll keep things going properly.

I am stunned your laptop draws that much power if you're not really flogging it. My configuration of a home-brew i5 desktop, a 45" curved monitor, a secondary 1920x1080 monitor, and my network switch and label printer is only drawing 170W. I can push the power to around 240 with a 100% processor stress test running.

Given the use of my UPS systems, the absolute time that it maintains power isn't the important factor to me, the lifetime of the battery when it's not being used around 99+% of the time is far more important to me. If in the rare instance I get a few minutes warning to allow the system to gracefully shutdown, I'm happy.

I always follow the same procedure when replacing the battery in my UPS as I do when replacing the battery in my vehicles. I first remove the negative battery cable (black). Then I remove the positive battery cable (red). When reconnecting the cables, I connect the positive cable first, then the negative cable. Just make sure that you don't connect the positive cable to the negative post on the battery, and the negative cable to the positive post on the battery. Another thing to consider is ensuring that you dispose of the batteries correctly by taking them to a location that recycles batteries. Don't just toss them in the trash.

Winuser said:

I always follow the same procedure when replacing the battery in my UPS as I do when replacing the battery in my vehicles. I first remove the negative battery cable (black). Then I remove the positive battery cable (red). When reconnecting the cables, I connect the positive cable first, then the negative cable. Just make sure that you don't connect the positive cable to the negative post on the battery, and the negative cable to the positive post on the battery. Another thing to consider is ensuring that you dispose of the batteries correctly by taking them to a location that recycles batteries. Don't just toss them in the trash.

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I posted a video of the battery swap of the exact UPS we're talking about, I figured that would be sufficient, but maybe not. The arrangement of the cables for the most part make the process fairly foolproof. I'd say completely foolproof, but I've learned over the years that fools are so ingenious that you can never be sure.

gunrunnerjohn said:

I posted a video of the battery swap of the exact UPS we're talking about, I figured that would be sufficient, but maybe not. The arrangement of the cables for the most part make the process fairly foolproof. I'd say completely foolproof, but I've learned over the years that fools are so ingenious that you can never be sure.

Click to expand...

One never knows for sure if or when Murphy's law will decide to kick in.

The thing is when I got this UPS years ago, I never used it the way it was intended. I recall just charging it to 100% when I got it. Then I recalled I had it unplugged from the wall outlet for a month or so. I read you aren't suppose to do that and leave it unplugged? Or that didn't matter? Then I connected the UPS back to the wall outlet a bit later. However, I almost never had the UPS powered on. I would connect my laptop and 2 monitors to a power strip or surge protector years ago. I basically had the UPS under my folding table desk and the few times I used it, it was to test how long my older xps laptop would last or connect it to my laptop during a power outage. I do not recall even connecting my monitors to it while doing these tests. I did recall I never tested fully how long my older laptop would last on the UPS because I think after an hour or so, I think it still showed like 30 minutes left or so. I would estimate it would last 1 hour 30 minutes. Would that sound right?


Then years later, when a power strip or surge protector had issues, I then decided to connect my older laptop and 2 monitors to the UPS. That was when I notice the UPS battery was no good and shut off real fast. At that time, it was a few years since I had the UPS. However, I rarely had the UPS even on except few times only. The reason why I didn't had my devices connected to the UPS and having it powered on all the time was I thought I read a UPS uses lot of electricity. So I basically used the UPS like a portable power station... but I rarely used it much at all. So that is foolish of me to have done that right? I literally used it a few times only. But the battery still goes bad that way? Almost always the UPS was powered off but was plugged into the wall outlet for that time.


The thing is my newer xps 15 9520 has an i7-12700h processor. So that is why it uses so much power? Older laptop was xps 15 9550 and had i5-6300hq processor. The thing is with the Anker 737 powerbank that has 24000 mah... the xps 15 9520 laptop draws max 65 watts or so. But I only got 1 hour 5 minutes max battery on it. I'm confused with what you mention with the UPS battery. So you are saying if you have all your devices connected to it and powered on all the time with it connected to the wall outlet, as long as a power outage doesn't happen and now you're UPS is on batter power, only those times does your battery wear out? My UPS, I estimate I had it on battery power less than 10 hours at the absolute max total during those few years I had it. Does that sound correct or way too little? Again, I didn't use the UPS the way you are suppose to use it. I basically used it when I had to like when during a power outage.

My main concern with replacing the UPS battery is when I read the description on Amazon for these UPS batteries, it says it can cause fire, explosion or burns with the mightymax. But it doesn't say that on cyberpower? The thing is both are non-spillable and sealed right? I think I read somewhere if you were to open the battery, it's the same inside regardless of the brand? The manufacturer just puts the sticker of cyberpower or mighty max on it and that's the only difference?


So that is why I sort of don't want to do this myself. I mean, you should wear nitrile gloves while removing the UPS batteries or that isn't necessary?


I'm just concerned because I feel it might be a bit dangerous if something goes wrong?

I have seen absolutely no difference between the actual Cyberpower branded batteries and the 3rd party batteries I've used. I have both APC, Cyberpower, and Belkin UPS systems here, all brands have had at least one battery replacement. Normally, I get two or three battery swaps before something else goes wrong with the UPS, then I replace the whole thing. That are all sealed batteries that can be held and mounted in any orientation.

If you feel more comfortable with nitrile gloves, have at it. I wear them when handling car batteries as most of the older ones aren't sealed. The newer AGM car batteries are sealed just like the UPS batteries as well.