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Posts: 102
Registered: ‎04-19-2010
Location: Atlanta
Message 1 of 5 (260 Views)

Strange Battery Behavior

I have custom settings for recharging my T410 battery that start at 70%  and stop at 95%, but what's happened the last 2 times is that when it goes below 70% it starts but it stopped at 89% the first time and at 81% this time.

I previously had it set to start at 75% for the last 2.5 years with no problem, it alwys went up to 95%.

BTW, the cycle count has only increased by 1 in the last 2 years, I use AC most of the time.

Any thoughts on this?

Bit Torrent
Posts: 2,349
Registered: ‎03-08-2012
Location: CA
Message 2 of 5 (253 Views)

Re: Strange Battery Behavior

Run it until it goes totally dead in which case the machine turns off. This does not mean to go into sleep or hibernate. Thats not dead!!
You either have to configure power manger to not do anything in case of weak battery or boot into something else where there is no power management EG CD tool or something.

The fully charge it and see what its says for its level. Once charged you can go into the TVT Powermanager and look at the state of the battery and also confirm/test it further.
T520 Model 4239 Intel(R) Core(TM) i7-2860QMbr>; Nvidia NVS 4200M Win 10 64bit
Z70-80 I7 - 5500U 16GB GB - 1TB HD Win 10 64bit FHD 17.3", G840 w/2GB

Retired Support Specialist
Posts: 524
Registered: ‎07-19-2012
Location: Raleigh, NC
Message 3 of 5 (234 Views)

Re: Strange Battery Behavior

You could also try resetting the battery in Power Manager.

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Posts: 9,501
Registered: ‎12-26-2009
Location: CA
Message 4 of 5 (207 Views)

Re: Strange Battery Behavior

It's possible that the AC power flaked out for a second, and the system saw that you weren't below the start-charging threshold after AC came back, so it didn't start charging again.

W520: 2960XM, Q2000M @ 1091/1380, 32GB RAM, 500GB&750GB HDD & 500GB SSD, FHD&MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 64GB SD card, WXGA+ screen
TPT1: 1839-23U
Posts: 102
Registered: ‎04-19-2010
Location: Atlanta
Message 5 of 5 (185 Views)

Re: Strange Battery Behavior

ColonelONeill you were right.  I did think of that possibilty, so I ran on battery most of Saturday and started charging when it reached 12%, however since it hadn't reached 96% before going to sleep, I stopped it at 62% and plugged in the AC this morning and it started charging again.  I just checked it and another anomoly occurred, the charging didn't stop at 96% but charged the battery to 100%.

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