Pila IBC: how can I charge a 8650 3100 mAh battery the first time?

[kreisler]

@fishinfool

They’ll be OK down to round 2.8V (under load) but are essentially flat at 3V under load - this will rapidly bounce back to around 3.6V off load. If it doesn’t bounce back to over 3V on standing, the cell should be watched carefully. Many/most cell protection circuits do not cut off on the voltage under load.

+ 1

when my 10440 light begins to dim (rapidly) the cell voltage, when measured quickly after taking it out of the LdOl, is at 2.0V and recovers to 3.00-3.10V resting voltage. in other words, a cell with 3.0000V resting voltage is very much empty and it should be recharged! A cell isnt empty at 3.6V resting voltage but that's the point when, under load, the voltage breaks through the barrier and drops to 2.75V within 30-60secs. If resting voltage is anywhere between 3.10 and 3.60V, you should take the cell out and recharge it with pila.