I have a laptop battery always hanging around, did not plug-in or use it mostly of the time, but rather as a spare/ back-up battery. Usually i plugged in with the laptop say just every 2 weeks to recharge it and keep it fresh. But last week, i did not do it...and what is shows:
Plugged in and charging...but 0% forever...
How do i rescue this battery? Thank you
Battery: VGP-BPS9A/B 11.1V/5200mAh
I don't think it can be "rescued" when it's got to the stage where it can no longer hold a charge. Charging it up every two weeks was too frequent in my opinion - - a laptop battery has a finite number of charging cycles, after which it reaches the end of it's useful life. Keeping a spare battery in this scenario has proved to be waste of money.
The one that your laptop came with is in better condition than the spare - -- it would have been better to wait until you actually needed a new battery before buying one.