If you are using the GoPro camera for extended periods, it is better to power the camera with a Battery Eliminator instead of connecting the GoPro's USB port to a charger. These 4V Battery Eliminators are terminated with a "4.0 x 1.7mm female DC connector" (EIAJ-02) on a 27cm (11 in) cable. The center pin ispositive.
The 4V Battery Eliminator does not include any voltage regulator and can be connected directly to a power source that is3.7 to 4.2 Volts DC at 1.5 Amp. It is possible to use a LiPo cell such as are used in R/C as long as it is the single cell, 3.7 volt type. We offer (while supplies last) a V15-4V battery pack that is fitted with a short cable terminated in a male connector that is compatible with the BE-4V Battery Eliminator. The battery eliminator snaps into the battery slot of all GoPro HERO3 and HERO3+ models and latches like the GoPro lid for a secure fit.
Using a battery eliminator eliminates two sources of heat. The charging circuit in the camera and the battery itself, which gets warm while charging. Less heat makes the camera more reliable. Overheating can cause unexpected shut-down of the camera. A battery eliminator also bypasses the problems that some users have had with the GoPro camera's charging logic causing the camera to freeze and require a hard reset.
WARNING! The warranty does not cover damage that may occur to the adapter or your camera if you connect the wires backwards to the source of power. If using batteries that can deliver large currents, include a fuse (allow 2A per camera) in the circuit. Shorting the wires or connecting the battery eliminator backwards will result in damage to the battery eliminator, a SIGNIFICANT FIRE HAZARD and potential explosion of the battery.