Is “overcharging” electronics real thing and if so why is it bad for them?

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Is “overcharging” electronics real thing and if so why is it bad for them?

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It used to be, but modern batteries and chargers have measures in place to prevent overcharging.

Yeah, long long ago, In the before time.. this use to be a problem and would ruin the battery. Things are good now here in the future.

Overcharging is a thing for some batteries, yes. Meaning, raw, unprotected cells. This includes things like NiMH and NiCD AA batteries, and [unprotected](https://www.fenix-store.com/blog/what-is-the-difference-between-protected-and-unprotected-18650-batteries/) Li-Ion 18650 and similar.

Mostly a thing of the past, though. Most chargers you can buy these days are smart enough not to overcharge, and pretty much nobody uses unprotected lithium cells directly. If you have some ancient charger lying around and think your rechargeables die fast, then it’s probably crap and you should throw it out and buy something modern.

It doesn’t really apply in any way to a modern device like a cell phone or a laptop. Those have internal charge controllers and they do whatever they think is best. Trying to work around what it does is pointless most of the time, since they lie to you anyway. Eg, your cell phone showing 100% charge is probably not exactly 100% of the maximum the phone thinks is okay to use, and definitely not 100% of what the battery is physically capable of holding.

If you want to preserve battery life, look for a battery saving mode in the settings. It’ll say it’s something like “Mainly AC power usage” on laptops and such.

Yes, overcharging is bad for batteries. Even just charging to full is bad enough to avoid if you can. Even if the device isn’t actually overcharging when plugged in, keeping the battery topped off at 100% isn’t great for longevity.

Some devices have built in protection. Certain android phones have settings to stop charging at 80%. Or it’ll keep it 80% overnight then charge to 100% before your alarm. Windows 11 can detect that you’ve been plugged in for a long time and discharges the battery to 80%.

I think some electric cars will just lie to you. When it’s brand new, 100% is actually 80% (for example). The extra 20% is locked away until the battery starts degrading and you need the extra capacity to have the same range.