Waterwings
Well-known member
Saw this on another site and thought I'd supply the info. Supposed to be some real sturdy trays and hold your batt(s) in-place, even in rough water. Seems pricey, but looks like a good long-term investment, imo. Aluminum tray and top bracket, with all stainles hardware:
https://www.basscatstore.com/batterytrays.aspx
https://www.basscatstore.com/batterytrays.aspx