One of my batteries appears to have completely died at Langerado. I think that it may have fallen off the car armrest onto the floor, but no abuse and no obvious physical damage. It hangs between 50-75% charged on my Impact charger and the 702 just keeps blinking orange, but when I have it connected to the 702 and try to power on, nothing happens. I'm going to try and send it back, but is there something else I should try?