Just got my Raymarine A98 today and was thumbing through install manual. Even at full screen brightness this unit draws only 6.5w so a standard 12v 9ah battery will run this unit for plenty of time and it is huge, fully featured and touch screen. With that said I se most these larger units being more power friendly than small units of days past. Technology has definitely caught up in the sonar world.
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CJ Siebler
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