Cheap and easy Fishfinder recommendations!

 
Im looking for a easy to install fish finder to put on/off my yak... Don't really wanna lug around a huge power source! Any of you have recommendations?

I'm new to FFs and wanted a learner portable one to figure out what to look for in a more complex and expensive one. I chose the Lowrance X4 Portable (there are non-portable versions too.) It has a transducer that mounts with a suction cup and runs on D batteries. I haven't had a chance to test it yet so I can't give functionality feedback. It got mixed reviews on most websites but if looked like most negative reviews were from PB owners who had the suction cup come loose and the transducer get chopped up in the prop. I figure that (assuming it works) it'll be a good investment as it can always be a backup or loaner FF for canoes, rowboats, etc.

I have a LX4 also. Don't bother with the handheld models. I used a 12 V flashlight battery so that's only two connections. The more connections the more problems. It's a functional entry-level model. I have the transducer affixed into one of my scupper holes. It works great.

I have a LX4 also. Don't bother with the handheld models. I used a 12 V flashlight battery so that's only two connections. The more connections the more problems. It's a functional entry-level model. I have the transducer affixed into one of my scupper holes. It works great.

Don't really wanna lug around a huge power source!

Even a power sucking higher-end FF/GPS no longer needs a heavy power source.  I recently replaced my 5 pound 7aH SLA battery with a 9aH Blue-Brick Li-Ion that weighs less than one pound.  See previous threads in "Drillin' & Cuttin'".