Directly charging over-discharged li-ion cells with my bench supply. Definitely nothing unsafe going on here.
-
-
Replying to @marcan42
I directly charged a Ryobi 18V pack (it's just 5 18650s in series) with a lead-acid-battery charger the other day
1 reply 0 retweets 2 likes -
just needed a few seconds to get the pack voltage up above like 6V or so, at which point the charger accepts it again
2 replies 0 retweets 2 likes -
Replying to @11rcombs
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.
1 reply 0 retweets 1 like -
I *think* 1.8V is still above the "it's gonna go boom if charged" range, but... we'll see.
2 replies 0 retweets 1 like -
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.
2 replies 0 retweets 1 like
Might actually be normal-ish though. Charge voltage plots do show 3.7V as a typical "depleted" initial charging voltage.
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.