The Wilderness Systems 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 excelsin 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. Important, please read: " Wilderness Systems Lithium Batter Product Memo" below under "Product Documents".
|Length:||4.5 in / 11.43 cm|
|Width:||2.75 in / 6.99 cm|
|Height:||1.75 in / 4.45 cm|
|Weight:||14 oz / 396.89 g|
|Power Output:||DC 12 Volt, 5 Volt|
So far I absolutely love this battery. I can confirm that this will power a Lowrance Hook2-7 with tripleshot transducer. I recently received the battery and have one weekend on the water with it. The battery shut down somewhere around 15-hours of use. I didn't time it exactly, but spent about 10-hours on the water the first day and about 5 the second day before the system shut down.
I've used this thing several times now to power my Garmin Striker 4cv, and overall I like it. There are a few things to be aware of though -- as noted below you have to manually turn it on (double tap button) each time you power on your FF. It may not work for all units because some draw too much current -- look at the WS website for more info. I put mine in a small drybag (the kind with a clear plastic window) in the pocket behind my seat for easy access. Note that the jack for connection takes up space, so take that into account when sizing a drybag or other container. Mine is in a Seattle Sports Micro bag, size medium. Wiring harness was easy to connect, all necessary hardware included, though I'm a geek and soldered mine.