[ChillyPete]

The transducer arm is telescoping to allow for various ice thicknesses.
The ammo box is a 50 cal. box and is a bit too big. It was the size that was on sale though. I could fit two batteries in parallel in there which is nice. Though, for the price of 2 7.2ah SLA batteries, you might be better off getting a lithium battery.

The current consumption of the striker plus 4 is 0.23A. It should last ~31 hours on a 7.2ah battery. Could be quite a bit less if cold temps.