The battery on the GoPro Hero3 (Black Edition) only lasts about an hour, so I picked up two spare batteries for it. But... there seems to be no way to charge them without putting them into the camera and then connecting it to a computer or charger. GoPro doesn't seem to make a charger for the batteries (only for the camera with battery inside). Has anyone found another way to charge these batteries? I really don't want to stay up all night when on a trip, charging one battery after another and there's got to be a way of charging these things without buying extra cameras just for charging! Anyone?