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The batteries I'm charging with it have something referred to as a 'protection circuit' which, I believe, replaces the need for a brain on the charger
Depending on how smart the charger is, with a resistor in parallel it may reduce the charge current to a value lower than that through the parallel resistor.
No, it means that if things go *really* wrong, you're unlikely to have a fire.
And that's "unlikely", not "won't"
If the protection ever kicks in, you should have stopped charging/discharging quite some time ago.
...snip In any way I wouldn't mess with the "smart" circuit within the battery snip..
Harald
If the battery is "smart", then probably the charge current is regulated by the battery's smart circuit, not the power supply. In that case the power supply's label may just be the rating, meaning max. current=800mA. This doesn't mean the battery draws 800 mA during charge. Have you measured the actual charge current?
Harald
On the other hand, 800mA may be a perfectly acceptable charge current.
What is the rated capacity of the battery. If it's lower than 800mAh then I'd be concerned. However charging at 1C is often within spec for LiPo cells.