The Mojo Outdoors 6-Volt SLA Battery Smart Charger is a replacement charger for the 6-volt lead acid batteries only. The 6-volt SLA charger monitors charge to prevent over charging, monitors and trickle charges to maintain a charge, and features and LED light to indicate the status. Do not use with Li-ion batteries.FeaturesFor 6-volt lead acid batteries onlyMonitors charge to prevent over chargingMonitors and trickle charges to maintain chargeLED light to indicate status