Full Charge Capacity of my 15 months old Acer Aspire A715-41G decreased from 52k to 33k in a week .

Harsh15

Hey I bought Acer Aspire A715-41G on Oct 2020 and can last about 4-5 hours of normal use on 80% charge limit and the full charge capacity was around 53k until the end of January 2022. I had used the laptop on charge limit of 80% from the first day and recently I switched off the battery charge limit and suddenly my battery life started decreasing, I didn't noticed it at first until I checked the battery report. Then I switched on the battery charge limit again and the full charge capacity stopped decreasing and settled at 33k. Now it couldn't last for even 2 hours of normal use on 80%. I have attached the ss of battery report. And also before January 2022 it could last for 4-5 hours on 80%.
I want to know is this normal degradation of battery or should I get it replaced or any possible solution for this?

JackE

Normal battery shelf wear level is 10-20% a year starting from battery manufacture date, not laptop purchase date. So I'm gonna guess your battery pack is probably 2+ years old. Might get a  better idea of its age by looking at the upc label of the box the laptop came in for laptop manufacturing date. The battery would be even older.  

Harsh15

Hey Jack thanks for your reponse, I'm not sure if this is the label you're asking for but the manufacture date written is September 2020 so it's basically a year and four months old. It's weird that before turning off charge limit it was giving backup of 4-5 hours on 80% charge and after two weeks of running with charge limit off it's lasting only 2 hours with 80%. I don't think it's normal if someone got an explanation for it? And yeah this all happened in two weeks

JackE

Yes. So the battery was at least 16mos old in Jan 22. It should've shown about 1.3 years worth of full charge capacity loss ---  meaning between 39Whr & 46Whr. Yet it was still showing 53Whr till recently. This suggests the battery monitor wasn't and probably still isn't properly calibrated.

To get a better idea if anything abnormal is going on, I suggest that you first turn off charge limits. There's little or no statistical evidence, other than anecdotal, that they do anything more than make the user feel good.

Then open Device Manager. Click on the batteries folder. Then right click and uninstall ALL drivers that you find in this folder. Then exit Device Manager without re-installing anything.

Then shut down Windows normally. And manually recalibrate the battery monitor using this method.

1.     With the laptop turned off, connect the AC adapter and wait for the battery charge LED to turn from solid orange to solid blue.
2.     Turn the machine back on.
3.     Disconnect the AC adapter.
4.     Use battery power until the normal Windows battery-low warning appears (~10%).
5.     Reconnect the AC adapter and fully charge the battery again.
6.     Follow these steps again until the battery has been charged and discharged three times.

Then run the battery report again.

Harsh15

Hey Jack, I've done all the things as you've said but still the full charge capacity remains same at 33K and rather decreased by 100 after doing the calibration, so I guess it's the normal wear of the battery. I've switched on the charge limit and it's giving somewhat 2.5 hours of battery life. Anyways thank you for your help.