FPV - Power 7Ah Waterproof Lithium Battery & Charger The Lithium Battery refines the kayak battery beyond the heavy and cumbersome marine batteries of the past. Lightweight and water resistant, the Lithium Battery not only excels in form but in function as well with multiple output options, superior efficiency, power and amp hours. The compact design conveniently stows in most kayak hatches. The FPV-POWER 7Ah battery is perfect for fisherman running fishfinders like the Lowrance Hook 4 or the Garmin Striker 4. At full brightness, you can expect 18-20 hours of use! These batteries are also great for running other low draw electronics such as lights and can also be rigged up to charge phones and cameras! Due to nature of Lithium Ion Batteries, only ground shipment is available with a special $14.95 shipping Fee.