Directly charging over-discharged li-ion cells with my bench supply. Definitely nothing unsafe going on here.
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just needed a few seconds to get the pack voltage up above like 6V or so, at which point the charger accepts it again
Yeah. 3.7V tablet battery, bypassed protection, couple mins at 100mA brought it from 1.8V to 2.7V and now it's happily charging.
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I *think* 1.8V is still above the "it's gonna go boom if charged" range, but... we'll see.
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Just a few minutes later on normal USB charging it's up to 3.7V. That doesn't quite sound right... the cells might be damaged. Meh.
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