Don't mean to jack the thread but while were on the subject of batteries. How do you pull the batteries and get the hatch closed afterwords. Jump the trim pump? I've had the boat for 3 years now and this is the first winter that the motors are still in the boat. The last two years my hatch was off.

Raise hatch, remove batteries, prop open hatch, disconnect and remove hatch lift ram, lower hatch manually. done!

I do this in my classic cars and boats.

I always disconnect the batteries from the boat. I plug the trickle charger into the storage buildings lights. That does two things, they only charge when someone is there, the charge time is less so the batteries won't run dry.