2 yellas on my 80 lb motorguide Xi5 and they do a good job. Never ran out of juice and I plug the onboard 2 bank charger in as soon as I get home. Unplug the next morning and wait till the next trip. I do not leave mine plugged in once fully charged. Blue tops for the motor and electronics. Batteries were bought in 2015 so I should be good for another 4 to 5 years. I also run all my power thru Perko switches and turn them to OFF so that nothing in the boat can draw any current.
From Genesis: "And God promised men that good and obedient wives would be found in all corners of the earth."
Then He made the earth round...and He laughed and laughed and laughed!