“Battery and external charger kits? Purchased the SONY POV HD Camcorder (HDR-AZ1/W) and the battery only lasts 80 minutes. Need to carry several with me, to have a longer video session. Purchased this camera to mount on my bicycle, and film my rides in their entirety. 80 minutes does not provide enough filming time for a single ride. Certainly like the small form factor of this camera. With the K-Edge Go Big Pro 1/4 Standard Thread Universal Camera Bike Handlebar Mount, this camera gives the GoPro a run for its money. Is there a dual battery charging adapter, since these take a while to charge?”