I have one 'good' battery in the lazarete on my 272 LE...One bad battery (dead) is located under the starboard settee. I've ordered two new group 27 "dual purpose" DEKA
marine batteries....w/approx. 2 weeks needed for delivery to the store....Our boat has been in the yard, but since I had one charged battery and one dead battery (approx. 7 yrs old, I unplugged the shorepower cord and just let the boat sit for the winter. I did not want to burn up the statpower charger trying to charge a dead battery... After 2 years, we finally have enough water to launch...Question is, can I probably launch & get the little diesel running w/just the one good battery....without waiting for the arrival of the two new batteries to arrive? O'Day recommended 95 ah batteries so that is what I have bought.(2 of them)..I've read about the battery switch issue(s) above, but in this simple arrangement and small boat, where we come back and plug in the shore power/charger almost every night, when sleeping at the slip, why can't we just stay on both? Thanks for the advice....? Patrick