On 2/5/23 09:16, local10 wrote:
Feb 5, 2023, 10:45 by y...@masson-informatique.fr:
I have a Dell Latitude e6220 with a 2 year 6600 mAh battery, which does not
charge above 67% since a few weeks. It makes me think that 1/3 of the cells are
in a bad state. However, upower says that the capacity is 95%, so remaining
cells are probably still good.
I don't know anything about battery, but I can do easy soldering. Is it worth
the effort to try to save this battery, or not? What could be done?
Doubt you can repair the battery. Batteries degrade over time and need to be
replaced with new ones, the old ones can be recycled (some electronic stores
will accept batteries and other electronic waste for recycling, so check with
the stores you have nearby).
If you laptop is still in good shape then buy a replacement battery and recycle
the old one.
Regards,
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?
.
Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/>