guy's - do not confuse the Xtar
MP1 and the new upgrade model
MP1S which became available in December 2011.
Per Xtar - "the MP1S, is the upgrade version of MP1.
MP1S can charge 14500, 10440, 16340, 18650, 15270 with connectors, which MP1 cannot."
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An info refresher from another thread:
Here is open circuit "Resting" Voltage for Li-ion:
4.3 volts = OVER CHARGED!!! (WARNING: Defective charger, discontinue it's use!)
4.2 volts 100%
4.1 about 90%
4.0 about 80% (I usually top them up back around here)
3.9 about 60%
3.8 about 40%
3.7 about 20%
3.6 empty for practical purposes
<3.5 = over-discharged
Continually discharging below 3.7v down to 2.7v PTC cutoff will damage cell and reduce life.
"0" volts means the Protection Circuit has been tripped
Cheers
Tod
The Equus 3300 offers a couple of options for testing batteries. For my EagleTac 18650, I tested it on BAT 9V and on DCV 20V. Both produced readings between 4.07 and 4.09 V. Keep in mind that the battery isn't freshly charged ... I have been using it for about a month. At what voltage should I recharge it?