The world’s most advanced fully automatic 12V battery charger! OptiMate 7 saves batteries other chargers can’t, because it recognizes the difference between a discharged battery that needs charging and a dead flat sulphated battery that needs saving. Perfect for months-long maintenance of any size 12V lead-acid battery – deep cycle, automotive, marine, motorcycle … Multi-stage desulphation: Restores neglected batteries from as low as 0.5 Volts. AmpMatic charge control: adjusts current to suit any battery size (3 to 400Ah) OR condition for fastest and most complete charge. Cell voltage balancing mode: optimizes battery performance. Tests before and after charging: indicates battery status, actively tests during long term maintenance. Interactive float charge: maintains battery fully charged, weeks or months long. CHARGING AMPS : 10A (AmpMatic) @ 14.4V. TEMPERATURE COMPENSATED VOLTAGE: Voltage compensation at -24mV / °C, from 20°C. USE : Indoor / Outdoor (lowest temperature: -40°F / -40°C). SAVE : Low Volt Start of 0.5V + 2-step desulphation recovery. IDEAL FOR : STD, AGM, GEL & Deep Cycle 12V batteries from 3 – 400Ah. 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.