https://www.reddit.com/r/batteries/comments/vuect8/the_freezer_treatment_works_for_old_lithiumion/
The freezer treatment works for old lithium-ion
I’ve had about an 85% success rate with rejuvenating rechargeable old lithium-ion batteries by putting them in the freezer overnight. They go from the freezer to the charger directly without first thawing out and they seem to regain about 70% of the original capacity. Sometimes they are too far gone but that’s not usually the case.
um wut? lots of people agreeing.
thread is claiming both… “the charger was willing to charge the battery after the freezer” and “longer runtime”
only thing close to an explaination of what they might be seeing.
Lithium batteries swell from lithium intercalating into graphite anoďes while forming C6Li…in the pores can also react with electrolyte causing volume change. Micro freezing can break it and can possibly revive the battery as long as there was no shorts thru broken membrane between anode and cathode. This is not stupid. Intercalated sodium in large graphite or carbon electrodes is a known phenomenon.
