i just got my kit friday and both batteries have been working fine. i go to charge one of them on the usb charger and the red light on the charger turns on but the led on my battery doesnt light up so i dont think its charging. i cleaned all the threads on both connections. for some reason it will charge in my pcc. ocassionally the led flickers though like it has a bad connection. again my other battery has no problems charging on either