Since I'm still waiting on the seller to either make right or send a shipping label for the used battery that was sold to me as new I am making a NiMH battery to get Avalon going.
The batteries are D cell NiMH 10aH batteries.
There are 2 bricks of 20 batteries all wired in series to make a 48V battery pack.
The dividers are made from heavy plastic. The outside is just going to be tape. The battery is 48V 10aH and weighs 13.6 lbs.