1--Voltage: 36V or 48V
2--Charge Port: 2.1DC
3--Dimension:Polly PD-4C:368.3x137.5x90mm(max fit 91pcs 18650cells)
4--Recommend configration:10S9P,13S7P,14S6P
5--With Power Switch and LED capacity indicator.
6--If you need inner controller and nickel, you can choose it