Thunder Power RC TP820CD 800 Watt Dual Port Multi-Chemistry DC Charger/Discharger/Cycler with Balancing System More than double the charging power of other similar class chargers. Selectable charge rates from .2 amps up to 2 amps for each port The balance connector adapter boards (2pcs) allow the built-in balancers to be used with 2-8S Thunder Power-compatible and JST-XH Balance connectors 24 user-programmable memories plus built-in data logging Wide input voltage range from 1.5-28.V for maximum efficiency and power output when using up to 24-28V and charging high cell count batteries Adult supervision is required