I use Tenergy rechargeable 123s in most of my gear. And for the first year I used them in the Apollo. During that year I had issues when it rained most times ... and an issue in an ice storm. All the issues involved the failure of the power switch to function. In May 2015, I sent the Apollo back to Aaron has it had gotten to the point where you unit would not stay powered on for more than 10s. He sent it back to Armasight. Not sure what they did. But after i got it back, it will not power on with the tenergies ... but it works fine with "surefire" 123s ... so now I only use surefire 123s with the apollo.
On **** website I note that many (all?) of the thermals say "do not use rechargeables" ... I mentioned to Aaron and he said one of the positives of Armasight was supposed to be that their gear WOULD work with rechargables. But for my Apollo on my land only surefires work now.
My theory had been to use rechargeables for "practice" but to use lithiums for actual hunting. But now I use lithiums in the apollo at all times. The lithiums last about twice as long as the tenergies. But I didn't mind that, it was good practice changing them in the field!
My c123 charging station has 4 stations:
01 - Ready to be recharged
02 - Recharging (in the recharger unit)
03 - Recently recharged
04 - At least one day after recharging complete (ready for service)
Aaron told me not to use rechargables right have they are charged as they might have too much voltage, hence the extra position in the "assembly line" to allow discharge time.
I still need to get a volt meter.
I also use the "big blue" rechargable batteries for some white lights and the t-20 ir illuminators with no issues.
I have a lithium in the CQBL, the one it came with maybe? I will try the tenergies in it next.
I do not have an AA charger, they all died. I only use AA in the 14s right now. I use c123 in COLR, PS-22, Apollo, CQBL, ATN and Armasight ir-illums, eotech and three different flavors of "flat" batteries in scope illuminators, strobes and beacons. The small chinese "300L" lights use AAA.
Now that Aaron sent me some c123 pouches, I can carry a set of SF 123 on left side and a set of T 123 on right side and store the old used ones in pockets.