The lithium battery designed to easily replace lead batteries in your boat or pontoon. Roypow battery is an advanced lithium-ion battery with built-in battery system, which can protect against overheating, short circuit, overvoltage, etc., so that it can effectively avoid potential safety hazards to prolong its life. life and optimize its performance. Water-resistant, ultra-durable and Bluetooth Roypow lithium batteries 10-15 years battery life and 5-year warranty bring you peace of mind. No water filling, terminal tightening and acid deposit cleaning.