【5X1, 1-Bank, 5A Per Bank】: Marine battery charger for all types of lead-acid & lithium-ion 12V batteries, including marine, boat, starter & deep-cycle batteries. IP68 waterproof fully-sealed charging. Boat battery chargers can be charged 24/7 onboard. 【3 Charging Modes】: 12V SLA/AGM (Lead-Acid), 12V LITHIUM（12 volt lithium battery charger LiFePO4）, 12V CALCIUM. Press "MODE" to select the appropriate mode to charge. 【Force Mode】: Onboard marine battery charger charge dead batteries. When battery is lower than 1V, you can manually begin charging: Only press and hold the “OK“ button for 3s. 【Auto Repair Mode & Advanced Diagnostics】: You don't need to operate boat charger.“12V Repair”light is on, automatically start repair. Advanced Diagnostics: Over Voltage, Bad Battery, Over Temperature, Reverse Connection. Help you find problems quickly. 【Enjoy Precision Charging】: An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates. 【3-YEAR WARRANTY FOR CHARGER】: 5-Grid Power Display - 20%, 40%, 60%, 80%, 100%. What’s in the box : 1* On board battery charger for boat ; 1* Battery clip; 1* Battery connector; 1* Spare fuse; 1* Bag, 1* Manual. Marine Battery Charger 5X1: 1-Bank, 5A Onboard Battery Charger - 5A Per Bank, 12V Waterproof Boat Batter Charger for SLA/AGM, Lithium, Calcium - Charged 24/7