Advanced 12V battery maintenance! OptiMATE 2 extends life and improves performance of a 12V battery, mounted in a vehicle / craft or battery operated system that is not in daily use, even in temperatures below freezing. OptiMATE 2 senses the battery condition, recharges and then keeps the battery 100% ready and provides power to the anti-theft alarm, display, on board computer, etc. The OptiMATE maintenance program delivers only what the battery needs, never overcharges, never undercharges. CHARGING AMPS : 0.8A (constant current) USE : Indoor / Outdoor (lowest temperature: -4°F / -20°C). SAVE : Low Volt Start of 2V IDEAL FOR : STD, AGM & GEL 12V batteries from 3 – 96Ah INPUT : Global (100-240V 50-60Hz), high efficiency (CEC listed), fully sealed. STYLE : Weatherproof case with wall mounts, with 6ft / 180cm AC supply lead and 6ft / 180cm charge lead ending in SAE connector. Weatherproof battery lead & standard battery clip set included. SAFE: No risk of overcharging. Totally safe for vehicle electronics. Sparks suppressed. Safe for long-term battery maintenance. Automatic shut-down if short-circuited or battery disconnected. 3-year limited replacement warranty.