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Healthiest way to charge Lithium Ion (lemmy.world)

submitted 3 weeks ago by root@lemmy.world to c/technology@lemmy.world

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When charging a phone wirelessly, there is sometimes significant heat generated. That combined with higher charging rates that are now coming out with the Qi 2 standard make me wonder what the ideal charge for the battery would be.

Most of the time I just toss my phone onto a wireless charger before bed, and don’t really care how quickly it charges. Would it be better to use a 5W brick with a charging pad? Should wireless be avoided and usb used instead?

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[–] NeoNachtwaechter@lemmy.world 35 points 3 weeks ago (7 children)

The very healthiest way? But maybe you won't like it :)

Don't charge above 80%, don't discharge below 20%, charging current at 1/10 of the capacity, and always keep the thing at average room temperature.

[–] root@lemmy.world 2 points 3 weeks ago (1 children)

I was actually thinking of using the battery charge limit feature to prevent charging above 90%. Not sure I could do 80 without an charge during the day, lol

[–] xep@fedia.io 7 points 3 weeks ago

Pragmatically speaking, for battery health you should charge only as much as you need the battery, so it sounds to me that in your case that's 90%. Also, here's a paper about battery charging:

Strategies to limit degradation and maximize Li-ion battery service lifetime - critical review and guidance for stakeholders https://deepblue.lib.umich.edu/bitstream/handle/2027.42/154859/Woody_Maxwell_Thesis.pdf

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