These seriously eat batteries. I have two of the S1.3 models. Regular batteries last about a week and alkalines about 10 to 13 days. Both start to have some blackout photos within five days which, in my opinion, is the level of power these things are sucking. Since they were only $50 each, I decided to hack one up and hooked up a 6v rechargeable lantern battery and solar panel. Four c batteries are 1 amp and the 6v is 5 amp. Theoretically, if I'm right, I won't get blackouts and won't replace batteries. If this works, it's a steal - $50 camera, $10 6v rechargeable, and $25 solar panel = $85 for camera that never needs batteries again. Hope I'm right and it works.