T410 new battery goes off when reaches 25%

[radiator]

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?

[Thinkpad4by3]

Is it a Sony battery? Sounds like the battery controller isn't learning.

[radiator]

It is Sanyo.

[RealBlackStuff]

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.

[jdhurst]

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

[axur-delmeria]

It sounds like a battery that has a dead cell in the pack.

[rakirkp]

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.

[mortimer]

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.