[BigTunaL]

Originally Posted by alanw

Yes, it's the same for all sizes of 12v batteries. Not sure about your fishfinder but my Lowrance displays the battery voltage on screen, yours probably does as well. It may be a setting you can turn on/off.

Also charge your battery after every use and keep it at 100% all the time for longest life.

Then again, I'm kind of anal about these things. I try and get the most out of my hard earned money. It's just a stupid battery so do whatever you want. The more batteries you guys send to the recycle bin the more lead bullets I can buy cheap