Be carefully measuring the batteries voltage, a short, no matter how brief can ruin your battery. Make sure the leads never touch while you are measuring. I bought some of these to use with my ICharger 306B's. Makes sure the banana jacks don't touch either if it is connected to the battery or you may see fireworks.
Yuneec Typhoon H Charge and Balance Lead Adapter
Yuneec Typhoon H Charge and Balance Lead Adapter