Charging with a higher powered charger generates more heat and degrades the battery life faster but is there a downside to using a smaller charger? (Like strain on the internals or something like that)

Hi there,

I have an old Laptop with a Li-Ion Battery, which degraded to about 15 minutes of runtime. I had some 18650 Cells laying around, so instead of buying a new Battery, I decided only to replace the individual cells and keep the casing and BMS-Chip.

Unfortunately, the runtime did not increase at all, even after trying to “calibrate” the Battery for about ten charge–discharge-cycles. Then I checked with BATExpert and found this in the logfile:

“Capacity Design : 48400

Capacity Full : 7645

Capacity : 7645”.

For me this looks like it still thinks, the degraded cells are still in there and therefore just uses the “save” amount of Capacity. I can confirm this, as the cell-voltage after a low-battery-shutdown was still just under 4.1 Volts and therefore allmost full.

Is there any way to “reset” this limit?

A few more information:

The laptop is a Toshiba satellite C855D – 15U running on Windows 10

The Battery has an 3S2P configuration, with 2 amp-hours per individual cell. The new ones are all individually tested and therefore known – good.

Sorry for any mistakes, english isn't my first language and this ist my first post ever.

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