www.gobrushless.co.uk4S ( 4 Cell ) Lipos from Himodel, lipoly-Pro, Align, Emax, EnErG, Airpower, Tornado or any other make with a jst-xh plug fitted will slot into the plug on the left. The right hand plug fits balancers / chargers such as Hyperion Lba 6, Lba 10 Ripmax EQ5, EQ6, Sharkpower and a few more.