I have 2 EGO 56v batteries with 2 - CH2100 chargers. One battery charges well on both chargers. The other battery (#2) when docked to either of the the chargers, causes the charger to turn on and off repeatedly. Fan starts, stops over and over. Green light on charger also blinks irregularly. It's almost like the charger is trying to start, then it stops. Is this an indication battery #2 is bad? When I press the battery pack's button, it does not light up at all. Any guidance would be appreciated.