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> First: What do you call negative and positive delta? It seems that
>
> positive delta = voltage is going down
> negative delta = voltage is going up

What makes you think that?

> why is the second test (delta <= 5) ? Shouldn't it be (delta
> >= 5), that means "turn off charging if the voltage
> went down at least by 0.005" Volts?

No, i guess it means "stop charging if the voltage doesn't rise that much
anymore".

> Does the first check (delta < -50) mean that charging
> stops if the voltage went up very quickly?

No, it stops if the voltage drops quickly, a negative-delta detection.

/Linus

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