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about battery gauge reset

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#1 seraphin


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Posted 03 February 2016 - 04:33 PM

Not sure if this question is proper for this group. If not, please help direct me to the right group.


Lenovo thinkpad provides a power manager software that allows for battery gauge reset. It's a hunch but it seems that there is a counting mechanism every time I "perform reset". In early days when I performed the reset, the battery life really seemed to be extended (e.g. from 1.5 hr to 2.5 hr when fully charged). Recently I made a mistake (?) by performing "several" resets in a row (when the battery condition was still deemed "good"). Suddenly after these resets, the battery condition changed from "good" to "fair" and the battery hours dropped significantly.


Questions :

  1. Is the battery gauge reset thing/button a software thing or a hardware thing ?

  2. If it's a software thing, can we "erase" the counting (if any) and start fresh ?

  3. Does reinstalling the power manager help (as Lenovo does provide a place to download the power manager) ?

Computer model:

Thinkpad Edge E420, Windows 7 Professionals

Any info will be appreciated. Thank you.


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#2 hammy745


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Posted 08 February 2016 - 07:14 PM



1. It would be pure software, it is basically talking processes in the background that are not needed and shutting them down

2. Reinstalling it would most likely do the trick

3. Yes, here is the download link http://support.lenovo.com/us/en/downloads/ds014924 make sure you download the top one that is 21 mb


Although the program is having a software problem of some sort this could have done something to the battery itself but that is unlikely


and just one question how long have you had it?


keep me updated with what is going on until it is working

#3 seraphin

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Posted 11 February 2016 - 06:58 PM

Hi, Hammy


First off, uninstall and reinstall new power manager helps a bit. I also uninstalled and reinstalled a "new" power managing driver provided by Lenovo.


When the mistake was made by performing multiple resets in a row, the "displayed" battery life went down to 30-40 min (in reality also similar).


After reinstalling new power manager, the displayed battery life now shows ~ 1:10-1:30h. It should be noted that with both old and new power managers, the conclusion that my battery can only store ~30-40% of the original full charge does not seem to change, which probably makes sense.


And based on my download record, I have had this laptop with the same battery since 07-2011. So it's been running for close to 5 years.

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