Light on Weight Heavy on POWERIt's hard to beat a RELiON lithium iron phosphate (LiFePO4) battery when they deliver everything you need to support life on land or water. They're built to last and designed to perform. Lightweight, durable and maintenance-free, our batteries charge quickly, store safely, and withstand the harshest temperatures and conditions. MORE USABLE CAPACITY Lithium batteries allow you to use 100% of their capacity, regardless of the rate of discharge LONGER LIFE up to 10 times longer life than lead-acid batteries, and they still provide 80% of rated capacity after 2,000 cycles PARTIAL STATE OF CHARGE TOLERANCE Partial charging does not affect performance quality or battery life CONSTANT POWER Full power available throughout discharge. Voltage does not drop like lead-acid LIGHTER WEIGHT 50-60% less weight than lead-acid equivalent MAINTENANCE-FREE Plug, play and charge. No watering TEMPERATURE TOLERANCE 2.5X more efficient operation at low temperatures. Safely operational up to149°F (65°C) INSTALLATION FLEXIBILITY Can be installed upright or on its side