OptiMate3 battery charger for 12V AGM, GEL and STD batteries from 3 to 40 Ah. Low-voltage savings - OptiMate3 is able to save a fully discharged 2 Volt battery. Maximum charge of 0.8 A. 7 Different steps of rescue, charging and testing in the program - FIRST AID for STD, AGM and GEL lead-acid batteries - OptiMate's unique FIRST AID recovery mode for lead-acid is a combination of low-frequency current pulses that break down crystallized lead sulfate and control the higher voltage to force the flow of current, restoring the lead-acid battery so that it can again receive and hold charge. - GOOD/BAD test after charging. The charger is weatherproof (min. IP54), rated for outdoor use. Rated for operation in cold temperatures as low as -20°C/-4°F. FEATURES - Checks battery status at the time of connection. Advanced models are also tested after charging. - UNIQUE MAINTENANCE SCHEDULE 24/7/365 safe maintenance keeps the battery at 100% and supports "always-on" vehicle circuitry. - EQUALIZES BATTERY CELLS with a unique pulsation method within a gas-free safe zone, brings each cell to full charge - for guaranteed higher battery performance. - SAVE "DISCHARGED" BATTERIES OTHER CHARGERS CANNOT be low volt, with restorative pulse charging. Advanced models include a "FIRST AID" SAVE mode for sulfated/fully discharged batteries. Standard Features: Accepts a supply voltage of 100-240V AC, 50-60Hz. Models for different continents are equipped with the correct AC power plug. Power draw less than 0.5 W (0.012 kWh per day) when not connected to a battery. Electrical Safety & EMC Approval - Certified and regulated to international standards by TÜV SÜD. CODE: 1-0782 CZ