Hi Ji Gantor,
I have one of these helmet cams also, great camera, I have some great vids from nationals and HBBB. I found that the batterys need to be replaced every 2 to 3 hours of filming even when they are the best money can buy I think I paid $14 for 2 of them Ultra lithium batterys.I havent tried rechargable batterys yet but I would be interested to know if anyone has tried them and how long they lasted.
Also found that the sound volume is very low as the housing doesnt have a hole for the microphone. If I was to put holes in for it ,it wouldnt be waterproof any more. Any ideas??
cheers
Fatboy