Life-Tech Battery Dock Wall Home Charger For Samsung NX Mini Smart Camera 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 try adjusting the 2 -/+ pongs connector with the battery -/+. If the battery have 4 charge connector, the -/+ is usually the first and last. If the battery have 3 charge connector, it is the first and second.