That's ex-"Che", now "Mariah", Tim D's Ariel. The one where Adam (when she was "Che") put the hard dodger on her.
I had considered putting the batteries under the aft-most part of the v-berth berths, but instead now have them on the cabin sole, just aft the bulkhead opening. A box over them makes a nifty step-up spot that aids getting in and out of my raised v-berth, and there is also the benefit of their weight being closer to the boats CG.
Gimmee beer!