Very weird NEW battery behavior battery acts very strange.

Hi.

My new battery acts very strange. The battery wear on it changes every day and in very large steps (see pictures in the post).

What have I tried:

BIOS update, BIOS reset.
Battery calibration (note, the battery still works and displays 0% when I do the following: 1) discharge the laptop to 20%, the laptop turns off; 2) plug in the charger and press the power button; 3) let the laptop turn on and then disconnect the charger; 4) let the laptop run until it dies (meaning it works for an hour displaying 0%).
Delete and reinstall drivers.
Remove and turn off battery, disconnect the battery thru paper clip on the "underside" of the laptop.

What I might try in a couple days:

Battery calibration thru acer care center.

This is the second new OEM battery and it still fails.

If nothing helps i'll try to replace the battery for the third time.

If you have any suggestions for my problem, you are welcome to propose solutions.

P.S. The BIOS version is 1.07 and is the latest version of BIOS as of 2019. The laptop is on Windows 11.

P.P.S. The old, worn out battery didn't do this. It discharged from 100% to 0% without randomly turning off at 20|30|40|50%.

P.P.P.S. The battery stops charging at 88% (the second battery charges to 100%).

P.P.P.P.S. English is not my native language, sorry for any errors.

[Edited the thread to add issue detail]

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DankElf

Laptop name is SF314-55g 53b0

This is the second battery.

On the second screenshot you can see that it displays much greater capacity than desing.

Puraw

https://community.acer.com/en/discussion/684642/very-weird-new-battery-behavior

The correct battery for your model is 48Wh, 4 cells, check if that is what you have installed now:

https://www.laptopbattery.com.my/acer-batteries/acer-swift-3-sf314-55g-53b0-battery.htm I recommend you try this:

Disable or uninstall your Battery Monitor and disable Acer Care Center (you don't need this and many of us have uninstalled it). Ignore any battery readings from AIDA or HWINFO but use instead Windows11 Battery Report. Also disable the Windows11 "Battery Saver" feature for the drainage procedure below, you can enable it again later.

Battery limiters and monitors as well as Acer Care Center can interfere with BIOS/Microsoft battery protocol. Start in Safe Mode (either in Windows or boot and after the Acer logo press Alt+F10), delete the two battery drivers with Device manager and reboot. (see picture).

Assuming you bought the correct battery for your model laptop (Post all the battery data for both batteries, old and new in your next post)

Check your Power Plan advanced setting that the battery hibernates below 8% charge. Charge the battery to 100%, wait a while and unplug the power adapter, then drain till the laptop turns off and hibernates at 8%. plug in the adapter and charge to 100%, wait 10 minutes then create a Windows11 Battery Report. Paste this line in the Command prompt and press Enter: powercfg /batteryreport /output %USERPROFILE%\Desktop\battery_report.html

Double click on the report on Desktop and print to PDF with your browser, post the PDF file on this thread. It must be a complete report to analyze the draining problem. If the Cycle Count box is left blank don't worry, normal with Acer laptops, it takes a few weeks after installing/resetting the battery to collect all power data from BIOS (not a Windows function)

I got your reply by e-mail, but Acer link to this thread did not work so I edited my original (this post) with the correct battery info for your laptop.

DankElf

https://community.acer.com/en/discussion/comment/1199471#Comment_1199471

@Puraw. Thanks for the reply! I did not try to boot thru safe mode. Will definitely do that.

As for the laptop model. I provided that info in the first comment. The laptop model is SF314-55G 53b0. I bought the correct battery (model number is the same as the one that came with the laptop AC14B7K). About the voltage. This and the first replacement battery both had voltage readings of 17V when nearing the full charge. The design voltage for this battery is 15V.

Sadly, the original battery that was with the laptop was disposed and I can't collect the data. The first replacement battery was also taken from me but the data of me charging it is provided in the first post. The second battery data is provided in the first comment to the post.

About power plan settings. The only thing that I changed as per you suggestion is to raise critical battery level to 6% (battery action = hibernate). Previously it was set to 4%.

I'll delete the battery monitors as per your suggestion.

I'll get back to you after following the steps you provided.

P.S. BTW I tried to talk to the shop that sold me these batteries and the only solution that they have is to keep replacing them which is just ridiculous :)

But if nothing helps (sigh)…

DankElf

https://community.acer.com/en/discussion/comment/1199471#Comment_1199471

Batteryreport.pdf

Hi! Did as you suggested. Here is the battery report.

About the battery number. Original battery in the laptop had this model number: AC14B7K. But if nothing helps, I'll try to exchange for a different battery.

Puraw

https://community.acer.com/en/discussion/comment/1199949#Comment_1199949

If you are addressing this to me, please type @Puraw at the top or click on Quote at the bottom of my reply. Otherwise I won't see it.

The full charged capacity of that battery exceeds the Design Capacity which is an inflated number by the vendor for that product, not a measured value! So yes, there is certainly something wrong with your battery, I suspect it has been refurbished and you need to get an original Acer battery for your laptop,

I bought once a cheap (probably refurbished) battery for my laptop that showed the remaining batter life after a few months use much higher than when installed (battery was getting more powerful, a miracle). Then I drained the battery to 5% (laptop turned itself off), plugged in the power adapter and let it charge to 100%. After that Battery Report showed lower but more realistic full charge results. You may give that a try😉

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