Lipo batteries made by ThunderPower / FlightPower among others come with TP balance leads - you can use this (6) 3S adapter to parallel balance up to (6) 3S batteries at once while parallel charging - parallel charging is the best way to take advantage of today's high powered chargers including the iCharger 3010B like I use.

 

It's important to read up on how to parallel charge batteries safely before using this product - while not difficult, it is important to pay attention when connecting / disconnecting batteries from a parallel setup.

Please ask any questions prior to purchase.

Thanks for looking! Chris.