THE 208B CHARGER IS DESIGNED FOR CHARGING 1S-8S PACKS UP TO A 20 AMP CHARGE RATE, WHILE ALSO GIVING YOU USEFUL TOOLS SUCH AS MEASURING THE INTERNAL RESISTANCE OF YOUR BATTERIES, OR SAFELY AND EASILY DISCHARGING PACKS FOR STORAGE. WITH A JST-XH & THUNDERPOWER BALANCE BOARD THROWN IN FOR FREE, YOU'RE READY FOR JUST ABOUT ANYTHING.