In a separate thread, some people said the 602C (SSC and Luxeon) had some problems accepting various brands of batteries, and might also not work correctly with underpowered voltage. I don't know if Ultrafire has corrected these things or not. I'm also interested in the SSC version, but I'll probably order the KD AAA first.
If you ars handy,
flashcrazy's fix seems fairly straightforward.
A lot of batteries fit woithout the mod.
Me:
The following batteries work
Ultrafire 10440 3.6V
RayOvac Hybrid
RayOvac 15 minute 850 mAH
Duracell coppertop alkaline
Dorcy Mastercell alkaline
Pure Energy rechargeable alkaline
The following batteries are iffy
Duracell 900 mAH does not normally work but I got the light to turn on by cranking the light really hard - I do not recommend this.
The following batteries do NOT work
Eneloop
Shoshone 900 mAH
Duracell 1000 mAH
Pure Energy XL digital
EDIT Energizer e2 lithium
LukeA:
Work: Energizer Rechargeables
Iffy: LaCrosse AAA rechargeables.
fatts:
Batteries which I have and work:
GP 1000mAH NiMH
Ikea Alkaline
YMMV
I have not seen many posts about the Ultrafire <1.2V startup problem lately.
Ernsanada (who did the
602c SSC review) seems to have a bad one. His was intermittant even on 1.5V alkalines.
Another CPF member got one without the o-ring resulting in a loose head.