Optimate 5 Start/Stop battery charger ideal 12V care for START/STOP and Deep Cycle applications. OptiMate 5 saves batteries from as low as 2V and will then charge and maintain the battery, all automatically. Perfect for months-long maintenance of any size 12V lead-acid battery from 15 up to 192Ah – deep cycle, automotive (also EFB batteries – start/stop systems), marine, motorcycle… CHARGING AMPS : 4A (Constant current, temperature compensated) USE : Indoor / Outdoor (lowest temperature: -4°F / -20°C). SAVE : Low Volt Start of 2V + 1-step desulphation recovery. IDEAL FOR : EFB, AGM, STD & GEL 12V batteries from 15 – 192Ah. INPUT : Global (100-240V 50-60Hz), 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.