What is the cutoff voltage for 18650 3.7V Li-ion batteries?
Since there is an internal regulator board on these how can they accurately be measured? When they reach their cutoff voltage will this circuit simply shut them off providing 0 volts to the load from that point?
I would like to debunk some of these Ultrafire batteries coming with crazy high maH capacities. I have a dummy load to drain them down, just not sure which voltage level qualifies officially for "depleted".