Common Sense RC Balance Pro balances lipo packs up 22.2V (6S). Features a digital readout of the your pack's individual cell voltages. Works as a stand-alone balancer/tester before charging or simultaneously with your charger, doing it's balancing function at the same time that your pack is being charged. 2.5mm spacing on pin connection allows over 90% of the packs in the market to be used without any adapter required. Adapter required to use with Thunder Power Packs.