Battery health changing with each battery charging and discharging cycle. P259-G2-MG

GajalShankar

I noticed that battery started charging fastly and discharging quickly. I then checked power report using powercfg energy command, and under Battery Information, I found that that battery design capacity(41,440 mWh) is way more than full charged capacity(17,716 mWh).
Also, I checked using batteryInfoview, and battery health level is quite low, i.e. 42.7% (17716/41440)*100
Why is it changing on every charging cycle from 0% to 100% then draining completely? Is there any Acer tool to re-calibrate the battery properly?

Acer Travelmate P259-G2-MG 

billsey

Windows is the one that holds the battery info and a recalibration for Windows is done pretty much constantly. It does get out of whack though if you aren't doing full battery cycles. Run in battery until Windows shuts down due to low battery, then plug in power and wait for full battery indication before turning it back on. Each time you do a full cycle it will get closer to be correct with the numbers.

GajalShankar

Yes, I followed your approach. 
Then again I checked using both powercfg report and batteryviewinfo
Battery health remains almost the same, not too much change but shouldn't it be improved?
Or shall I wait for some more days?

Battery Info -

Errors -


Note - Actually, the whole battery problem occurred last week only before then battery was working fine. In just 2-3 days it's obvious to say something wrong with the battery.

billsey

Each recalibration cycle gets it a little more accurate. Try it a few times before deciding the battery itself is going bad.