eli5 why is it that if we leave a battery overcharging it starts losing its charge-retention capacity? For example in laptops or phones.
In: Technology
It doesn’t. That quirk only applies to Ni-MH batteries. Li-ion does NOT do that. It, however, wears out with recharge cycles, so you can only get so many (~1000) 0-100-0% cycles out of it before it can’t keep charge anymore. In Ni-MH it’s apparently crystals forming inside and inhibiting the movement of ions as a result of repeated overcharging.
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