Originally Posted by
Bald Paul
Oh, mine are advertised as waterproof to 33 ft underwater. I've had other devices advertised in a similar fashion, and water still managed to get inside them. As soon as I installed the battery door with the small cutout that allowed access to the charge port for the external power supply, the 'waterproof' rating goes to zero.

mine don't have replaceable batteries. I have good battery life but I also have multiple units. so when one dies I just use another that I carry w/ me. kind of like carrying an extra battery, I guess. if you can change batteries, why us an external power source, instead of carrying extra batteries? just curious