the flash work really well at night. but what i did is covered the flash light with light paint cause i don't want to spook the bears, all i want is enough light to see the shade of the animal and of course the time it hit the bait.
as for the battery life , one of my moultries 100 cam took just about 200 photos and some were taking during the night until it finally died , so again not bad at all .
now just one downfall i've notice with the moultrei 100 is the range, the cam has to be within 20' or it won't pick up the motion, while other cameras of mine has much longer range, but again 20' to me is more then enough !
I am not sure if porka is looking at the same cams or has the same cam but i do recommend them to anyone, i've been happy with mine so far !