Laptop Battery Level dropping like a stone.

Thanks very much for all the advice. I'll probably just charge it up and use it bit by bit until I get to the point when it needs recharging and pay less attention to the %. Life's too short. I'm grateful for your help.

Thought I may as well follow my own advice and I've given mine a charge to 100% (first time in a year or more I guess). The estimated run time can vary a lot as shown here. Working with spreadsheets at the time.