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T410 new battery goes off when reaches 25%

T400/410/420 and T500/510/520 series specific matters only
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radiator
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T410 new battery goes off when reaches 25%

#1 Post by radiator » Mon Sep 09, 2019 2:01 pm

I have bought brand new replacement (aftermarket) battery. I use Power Maneger to manage my battery settings. When that little gauge shows 25% left my t410 suddenly turns off itself. Is there sth that I can chande in PM or somwhere else to somehow solwe the problem?

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Re: T410 new battery goes off when reaches 25%

#2 Post by Thinkpad4by3 » Mon Sep 09, 2019 2:29 pm

Is it a Sony battery? Sounds like the battery controller isn't learning.
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radiator
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Re: T410 new battery goes off when reaches 25%

#3 Post by radiator » Tue Sep 10, 2019 12:51 am

It is Sanyo.

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Re: T410 new battery goes off when reaches 25%

#4 Post by RealBlackStuff » Tue Sep 10, 2019 2:59 am

I'd say that is a knock-on effect of a knock-off battery.
Their control-chips are either poorly designed, poorly imitated or even missing.
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Re: T410 new battery goes off when reaches 25%

#5 Post by jdhurst » Tue Sep 10, 2019 6:29 am

You should probably try a Lenovo battery, or at least a warranty-approved battery replacement.

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Re: T410 new battery goes off when reaches 25%

#6 Post by axur-delmeria » Tue Sep 10, 2019 8:59 am

It sounds like a battery that has a dead cell in the pack.
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Re: T410 new battery goes off when reaches 25%

#7 Post by rakirkp » Fri Sep 27, 2019 3:46 pm

I had similar problem. T410 was actually going hibernation. I reset the charge threshold to 90% and set the critical battery threshold as low as possible and the low/critical battery on AC action to none. No more problem.

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Re: T410 new battery goes off when reaches 25%

#8 Post by mortimer » Fri Oct 11, 2019 3:06 pm

I think the real problem here is voltage sag.
No-name recycled cells, often misbalanced will do this.

If you have access to a spot welder you can replace your cells with genuine panasonic cells.
Your BMS is probably fine.
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