LED indicators, Red = charging, Green = Battery full. If the battery have not been used for a long time, the charger will shows green. It's normal, it needs 5-6 hours to active your battery, then the light will trun red, and charge normally.
Short Circuit Protection, more safety when charge your battery.
Electrode Reverse Connection Protection, It plays a protective role when the wrong electrode is accidentally connected. The correct connection method is: Red clip connects to positive, Black clip connects to negative.
For all 12V valve-controlled maintenance-free lead-acid batteries, motorcycle battery, car battery, backup power, ups, emergency power, solar, audio, fire power, security power, ATVs and Lawn Mowers, Electric Sprayer.
Notice: Only for 12V Sealed Lead Acid (SLA) Battery!!! Do not use this charger on other battery.