I am selling a Samsung Elipsys 8 inch tablet.
I have been using it with Navionics/GPS.
It is a wifi version, unless you have verizon, but you do not need either
to use GPS on the water.
I used it sunday, started at 6:15 went till 12:45 and still had 42% battery life.
Of course you could always use a car charger plugged into your boat outlet.

Only reason I am selling it is because I got a smoking deal on a 958c DI

Asking $85.00 shipped to your door.
Paypal is cool.
Comes with charger and original box.

Living the American Dream in central Texas !