I can provide images of an MTM Case-Gard 50 caliber ammo can (AC-50C) with various sized SLA batteries that will fit inside. Note: The batteries will “fit” but may exceed the weight capacity of the handle.
The 7ah and 12ah batteries must be elevated maybe 1/2″ above the bottom of the case.
1. Four 7 ah batteries will fit inside. Total ah = 28.
2. Two 12 ah batteries plus one 7 ah battery will fit. Total ah = 31.
3. One 35 ah battery will fit into the bottom of the box with only the electrodes protruding into the lid of the box.