Meet the NOCO GENIUS5 . one of our most powerful . highest-performing . energy-efficient . and compact portable universal battery chargers yet. The GENIUS5 is a 5-amp (75-watt) - 100-240VAC 50-60Hz - 6-volt and 12-volt heavy-duty battery charger . battery maintainer . trickle charger . float charger . and battery desulfator for up to 120 amp-hours. It's designed to charge and maintain all types of sealed lead-acid and lithium-ion (lifepo4) batteries . including flooded . gel . maintenance-free . AGM . SLA . VRLA . as well as automotive . marine . RV . powersports . and deep-cycle batteries. Its advanced battery repair regenerator mode uses slow pulse reconditioner technology to automatically detect battery sulfation and acid stratification . restoring lost battery performance for extended battery life. It can be used and stored almost anywhere - home . garage . mobile . bench . or in car - to charge and maintain any battery - even plug in through your vehicle's 12V auxiliary cigarette lighter port. Its next-generation charging regime utilizes fast charging microprocessor technology to rapidly recharge batteries without any manual intervention. It's a completely automatic . worry-free . professional . and commercial-grade intelligent battery charger with zero overcharge. Designed to be dual purpose - both indoors and outdoors - providing weatherproof and waterproof protection from the outside elements during any time of the year . including winter. Its X-Connect battery connectors - better than SAE - allow for quick-connect permanent connection or connecting directly to the battery terminals. A digital display provides the charging status and tests diagnostics for multiple conditions such as a dead battery . bad battery . reverse polarity . and more.