What Makes Waterproof LiFePO4 Batteries Ideal for Marine Applications? Waterproof LiFePO4 batteries (24V 50Ah-200Ah) with IP67 ratings withstand harsh marine environments. Their sealed design prevents water ingress, while built-in BMS protects against overcharge, overheating, and… Which Waterproof LiFePO4 Battery is Best for Trolling Motors and Inverters?