I am fairly new to the hobby of model planes and i ordered a FT explorer starter kit and assembled the plane and attempted to fly it. The first time, the plane didn't fly and crashed. I thought the center of gravity was off so i moved the battery and tried again. The plane crashed again so i took it inside and checked the battery on the charger, and i left it on for a few minutes and cell one was not charging. (the battery is a Hyperion G5 3s 2500 mAh). i don't know whether this is a problem with the charger or the battery itself. Any help is appreciated.