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Battery overcharing

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Halcyon:

--- Quote from: PlainName on December 27, 2023, 02:28:32 pm ---
--- Quote ---I guess that a good charge controller is supposed to switch off after the saturation phase anyway.

--- End quote ---

Well that's the issue here - we are guessing, and no-one seems to know why some manufacturers (who, after all, would probably prefer not to make out that their product might be a bit iffy) state that the phone shouldn't be left on extended charge. If the charge controller, however that's implemented, could just consider the battery done and turn it all off, there would be no need for such warnings, would there? Indeed, does Apple have similar warnings despite apparently being able to control the charge from software?

--- End quote ---

I would suggest that it's likely the manufacturer (or whoever wrote the manual) don't actually know any better or, they know full well their product is crap, the battery is going to swell and the user isn't going to follow their instructions, therefore they can turn around to the user and say "you didn't follow instructions" while denying any warranty claims. They would probably get away with the latter in many countries without strong consumer protections.

Halcyon:

--- Quote from: tooki on December 27, 2023, 02:48:54 pm ---If you don’t even know why you were removing the battery and powering it externally, I hardly consider that a useful anecdote (never mind a data point).

--- End quote ---

Because some models of iPhones will refuse to boot properly if the battery has failed, even if you connect it to external power via the data port. The iPhone 6, 6S and 6 Plus are among them.

To get it to boot, you need to physically dismantle the handset, remove the failed battery and either replace it with a known good one, or power it externally via the pins which would ordinarily connect the battery to the mainboard. There are purpose built jigs to do this which are easily available online.

This is based on my own personal experience after examining and extracting data from hundreds and hundreds of iPhones. Whenever I get an iPhone 6 and it's stuck in a boot loop, it's usually the battery causing it.

Siwastaja:

--- Quote from: PlainName on December 27, 2023, 07:06:17 pm ---
--- Quote from: Siwastaja on December 27, 2023, 02:54:16 pm ---if it was normal for a phone battery to completely die by sitting two months plugged in, we would be seeing a lot of complaints, and N would be in millions, not 1.

--- End quote ---

Absolutely! But that's a straw man and you know it - no-one has suggested anything like that timescale.

--- End quote ---

I mean, it was literally* here: https://www.eevblog.com/forum/chat/battery-overcharing/msg5241633/#msg5241633

*) not two, but "a few", sorry.

PlainName:

--- Quote from: Halcyon on December 27, 2023, 11:11:59 pm ---they know full well their product is crap, the battery is going to swell and the user isn't going to follow their instructions, therefore they can turn around to the user and say "you didn't follow instructions" while denying any warranty claims.

--- End quote ---

OK, so you now agree that there may be a battery issue (not necessarily swelling - reduced life is sufficient) if the device is left on charge past when it is fully charged?

PlainName:

--- Quote from: Siwastaja on December 28, 2023, 07:16:21 am ---I mean, it was literally* here: https://www.eevblog.com/forum/chat/battery-overcharing/msg5241633/#msg5241633

*) not two, but "a few", sorry.

--- End quote ---

OK.

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