MOTOPOWER MP00207A 12V 2Amp Smart Automatic Battery Charger Maintainer for Both Lead Acid Batteries and Lithium Ion Batteries Fully Automatic - No need of any manual operation, just plug and leave it for charging and maintaining your batteries automatically for long time. Micropressor Controlled 4-Stage Charge - Diagnosis, Bulk charge, Absorption and Maintenance. The microprocessor controlled program will automatically charge the battery at proper charging rate in each stage and maintain the battery at proper voltage for long time. Safety Protections - Multi-level safety barrier prevents unsafe and abnormal conditions. No worry about overcharge, short circuit and reverse palarity; Spark Free Technology. LED Indicators - 4 LED Indicators: Power, Charging, Charged/Maintain and Reverse Connection. With SAE quick release connectors design. ECO-Friendly - Zero current draw from the battery and low power consumption. Comply with the highest energy saving standard. For special program design of charging both lead acid batteries and lithium ion batteries, it may not activate deeply discharged batteries below 8volts.