middot Suitable for charging 2V, 6V and 12V batteries middot Automatically switches to trickle charge once battery is full middot LED indicator shows charging state middot 1 switch with 3 modes to select appropriate charge for correct voltage battery middot Short circuit and wrong polarity prevention A plug in charger suitable for 2 to 12V sealed lead acid type batteries up to 9Ah. Connect the leads to the battery terminal and the LED lights to show correct charging. At the end of the charge cycle the current decreases to a trickle charge at constant voltage, to keep the battery fully charged, and the LED starts to flash. One switch with 3 settings to set to the type of battery you are charging, either 2, 6 or 12V.