Quote:
Originally Posted by lattesurf";p="
gbakakos , for trickle charge, the charge rate should be at 0.1C or 100mA. The USB port should be alright, but not on the AC adaptor. Since the AC adaptor supplies 1A which is 1C, the trickle charge current is too high.
Besides, there are no safety cut off sensors in the AC adaptor. So the adaptor would continue supplying 1A even when the battery has charged fully. This 1A is what causes battery damage when it is over-charged.
These players are cheap goods, so you can't expect sophisticated features like cut-off/temperature sensors in the chargers, as what all brand-name players or rechargeable batteries/chargers have.
So basically, when it's charged full, unplug your player. Trickle charging for extended periods isin't good for the battery either.
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That's not always possible, though. You might start charging, then you have to go out in a rush, youi forget youre charging your player. Next thing you know, you come back, your house has burned down! That may be a bit extreme, but Ive seen the youtube video of what could happen when you overcharge a lithium battery... pretty scary. Its not just chemicals melting keyboards but fire that could catch and spread. So it people are going to use these cheap AC chargers to charge their battery, it is good advice in any case to have a good quality battery and not overcharge it.