So where does the battery go? My batteries are similar to this one
In the back, under where the "cup" is for the transducer. There are 4 screws, and the whole back half comes apart. Battery is nestled nice, tight and comfy right inside.
If you have a line on a Genz box, that's great. I purchased last week from Scheels in Eden Prarie, MN. They had several in stock. Check online, or call that store. Also Reeds sports in Onamia, MN had a few in stock. If they don't show online, give them a call.