Re: OT: repair/replace cell in Li-ion battery?
On 05/02/2023 23:32, gene heskett wrote:
Speaking as a CET with some knowledge of battery degradation, the
thought of replacing an individual cell in a li-ion battery scares me.
That new battery will have a bit more capacity, which in turn may force
other older cells into reverse polarity, accelerating the rate of
failure of the rest of the cells, with the possibility of starting a
fire you can't put out. IOW, don't even consider it. Battery rebuilders
with any care for the result, may and should select the cells with a 1 %
or so like capacity, meaning your rebuilt battery s/b safe, but may not
have the labeled capacity. Does your charger know about the reduced
capacity?
I would not be surprised if nowadays a laptop battery (at least original
one) has a balancing circuit that compensates difference of cells
capacity e.g. due to non-uniform degradation.
By the way, Ottavio may be right. Some laptops have UEFI settings to
maintain battery charge level of approximately 70%. It may mitigate
degradation if laptop is mostly working from AC adapter.
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