Board Thread:General Nerf discussion/@comment-27306930-20160213061357/@comment-27306930-20160218024459

Yes, I have a trusty old digital multimeter. I couldn't really find anything reliable about the min threshold, but 3.2v seems right to me. In general, (and there are a lot of exceptions) most batteries maintain a consistent voltage while discharging. However, the current will drop off steadily. When they get down around 15%-20% the voltage starts to decrease too. That's the right time to let 'em cool off and recharge them.

Granted, my info might be dated, because there are a crap load of new battery types in the past few years, and their characteristics are all a little different. I have a set of Ni-Mh cells in a helicopter that go flat out, then just die. But what I said above is generally true of most chemical batteries.