Well, I believe I will have a new fish finder under the tree before Christmas Day, and I've already started thinking about how I'll rig the battery. I already have the Scotty mount, post, etc. for the fish finder itself, just no power...yet. I see a lot of guys running those 12V rechargeable batteries that look like tiny trolling motor batteries; however, I want to go smaller and lighter.
My fishing trips are limited to 3 to 4 hours max...most times 2 to 3 hours would be normal so I don't need to run it for 8 hours or anything. I've heard guys running 8 AA batteries by purchasing the battery holder, leads, etc. from Radio Shack and I could easliy do this. I also think a set up like that would fit in the dry storage hatch in the console beside my cup holder (I have a Old Town Dirigo).
My question is with the specs I've attached, would 8 AA batteries provide the power I need? I know enough about electrical work to be dangerous, but not enough to calculate the run time on a power source given the drain from the fish finder.
Any help is appprecated.
Display Size:3.5" diagonal
Display Pixel Matrix:320V x 240H
Display Type:Color TFT
Display Colors/Grayscale:256 Colors
Single BeamSonar Coverage200 kHz / 20° @ -10db
Target Separation:2.5 inches
Power Output (RMS):200 Watts (RMS)
Power Output (Peak to Peak):1600 Watts (Peak-to-Peak)
Mount:Tilt and Swivel
Unit Size:4-3/8" W x 6-1/8" H x 3-1/4" D
Transducer - Standard:XNT-9-20-T
Transducer Mounting:Inside Hull or TransomPower Input:10-20 VDC