Max battery level 6%

filorigo · December 17, 2015

Hi everyone,

I have an acer 5739G, it's original battery doesn't go over 5% even after many "full-charge-discharge cycles".

Few days ago I got a new Lavolta supported battery and it has the very same problem.

This is what I did:

-got the new battery, put it in the laptop (turned off) and let it charge for the night.

-then un-plugged and turned the laptop on: it said the remaining battery was 6% but I didn't worry, the battery is supposed to arrive fully discherged; I let the laptop drain the battery until it turned off

-re-charged it for the night once more and a few hours in the morning. when I turned it on (unplugged), battery level was still 6% (?!?!?!).

-drained the battery once more; but this time re-charged it while turned on:

--when it got at 6% the charging light turned from orange (charging) to blue (full) and the win10 icon says: "6%, connected but not charging"

I run a win10 battery report and it says:

MANUFACTURER SIMPLO SERIAL NUMBER 2455 CHEMISTRY LION DESIGN CAPACITY 48 mWh FULL CHARGE CAPACITY

726 mWh

which means that either the battery has a lower capacity (64.4 mAh) (which I duobt) or it doesn't fully charge.

Here is the website I used to convert capacities:

https://milliamps-watts.appspot.com/

Does anyone have an idea about what's happening?

ohh, here's some more data that may help:

SYSTEM PRODUCT NAME Acer Aspire 5739G BIOS V0.3306 08/24/2009 OS BUILD 10586.17.amd64fre.th2_release.151121-230

Thanks for support.

Have a great day.

Kobathor · December 17, 2015

It's L-Ion? You don't need to do full charge/full drain cycles, that actually can damage L-Ion batteries.

filorigo · December 17, 2015

this is what the instructions on the box say

It's L-Ion? You don't need to do full charge/full drain cycles, that actually can damage L-Ion batteries.

Kobathor · December 17, 2015

this is what the instructions on the box say

The instructions always say that. You only had to (before, with non L-Ion batteries) fully charge and discharge it once to calibrate the battery, but with new L-Ion batteries the process happens at the factory, and your laptop will automatically know what to do with the battery. It's not recommended to full charge/full discharge with L-Ion because again, it damages the battery after a while.