there are 2 types of 3V style of rechargable lithium (li-ion)
one is regulated back (probably simply and cheaply)
one is different chemisty Li-Fe-PO
tenergy could potentially sell either one of them
i think BatteryJunction sells more li-fe-po 3v than regulated, cause he was talking about it.
http://www.batteryjunction.com/rc375reliba.html
anyways, which is it? they can Both be classed as a sort of li-ion, and both can be called 3V, but a li-fe-po4 shoud probably say on it on the side.
IF its one of them, then it charges to 3.6-3.8 or so, discharge starts at about 3.6v and it should work ok in most lights that were using lithium primaries, cept the reduced capacity Vrses tossaways. stop discharging around 2.4-2.2 .
so they list the cell as a "nominal" 3.0 , but its really pumping about 3.6V into your usual light, which is a helluva lot better than 4.2v which is outside the RANGE of most of the low voltage current control drivers.
(umm so this is good, and it should work great in a single 123 light thing)
and
you got the 2 cell light which uses a higher voltage current control, which usually means that, even a li-ion would work without problems because the 2x123 drivers handle more like 9v.
a lithium primary starts its voltage as high as 3.3,
this li-fe thing about 3.8.
a li-ion starts at about 4.2 and can provide a good 4.0 in lights.
trying to determine the "capacity left" from the voltage of those is going to be quite difficult , they dont droop much. they spill out thier juce strongly then drop like a rock after the capacity is gone.
gee what does that mean? your all set, everything should work fine, put away your meter
