First adjust the push plate to accommodate the size of your battery; The plus plate can be pull down fit various size battery (up to 76mm) as shown in the picture. Place the battery on the push plate and align the 2 adjustable connector pong with the battery -/+ (If you can not identify the -/+ on the battery it is usually the first and last charge connector on the battery). Simply connect the dock to a power oulet to start charging. Charge status indicator LED ( Red LED indicate charging Green indicate idle). If Red LED does not indicate please properly adjust the 2 -/+ pongs connector with the battery -/+. If the battery have 3 or 4 charge connector the -/+ are usually the first and last charge connector of the battery.