this post was submitted on 16 Feb 2024
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[–] [email protected] 34 points 10 months ago (2 children)

I live in earthquake, volcano, and tsunami territory, so I think I'll keep charging to 100% for now.

When I lived in the US and went through a hurricane, we had no power for almost 2 weeks and that stuck with me.

[–] [email protected] 19 points 10 months ago (2 children)

Long term, keeping your phone at 80% and having battery backups charged is going to be your best bet, assuming having having said battery backups is reasonable for you. It won't take long for your 100% to suddenly be what 80% was when the phone was new.

If/when a situation happens where you need it, you can charge up to 100% no problem off the backups.

[–] [email protected] 6 points 10 months ago (1 children)

Well this applies to anything with a lipo/ion battery. If you charge your backup battery pack to 100% then store it, it's very probably you'll end up having a drained and fully dead battery when you need it.

Wonder if there are any battery packs designed for long term storage. They could hold 100%(4.2v or whatever) but would internally discharge slowly down to 80% then stop. I bet those huge batteries YouTubers use don't even have that level of BMS. It's trivial software but planned obsolescence that eco friendly capitalist companies would never do.

Here I am with 5 year old RC 5k cycle lipos that still have at least 80% of their manufacturing capacity.

[–] [email protected] 7 points 10 months ago* (last edited 10 months ago) (1 children)

Obviously that'll be true with battery packs too. They're also significantly cheaper, so it's usually fairly reasonable to have multiple and them being at 50% capacity doesn't matter nearly as much.

[–] [email protected] 1 points 10 months ago

That's correct, I agree with you.

That requires this knowledge of how batteries work. Saying keep a battery pack and your phone at 100% could leave people in a situation worse than if they just used the battery manager to stop their phone at 85%. 99% of people will plug their battery pack in until it's full, stash it wherever they decide for emergencies, and will find a dead pack when they need it.

[–] Ghostalmedia 1 points 10 months ago

True, but if you live in a place with natural disasters, and local officials recommend keeping a go bag, you should make a habit to check that once a year. Charge the batteries, swap expired food, etc.

[–] Ghostalmedia 0 points 10 months ago

Sure, but if you treat your battery poorly you’re actually going to have less uptime in a natural disaster.