I've bought a couple panasonic/energizer cr123a off ebay before.. I want to get a second, edc, flashlight but alot of them are cr123a... so it got me thinking about rechargeables. right now, getting back into rechargeables I might like a pair of cheap rechargeables (aaa/aa) like eneloop, and a decent charger. If eneloop has that good retention then will be good in my book.