Genius 1 Charger 6V/12V. Fully automatic battery charger designed for 6-volt and 12-volt lead-acid batteries, marine and deep cycle batteries, including wet, gel, AGM, and maintenance-free lithium-ion batteries. With an integrated temperature sensor, it detects the ambient temperature and adjusts the charging to prevent overcharging and undercharging. It also recharges dead batteries. It recognizes sulfation and acid stratification and restores lost power. Compatible with all types of vehicles. Ultimate versatility and strong performance. Whether for cars, motorcycles, lawnmowers, ATVs, tractors, trucks, SUVs, or boats, the safe and modern Genius 5 charger with a charging current of 1 A enables fast battery charging. This battery charger also efficiently supports maintenance charging for seasonal vehicles and RVs. Charging dead batteries is even possible with the Genius 5. Excellent protection for reliable results. The charger easily withstands splashes and dust, and thanks to complete touch protection, impacts cannot harm the Genius 5. An integrated temperature sensor also detects the ambient temperature and adjusts the charging to prevent overcharging in hot climates and undercharging in cold climates.