Voltage Introducing the First in it's class VT-4 Small Aluminum Battery Tray with strap designed for 12V - 4AH and 12V 5 AH standard size batteries , these battery sizes are very popular used in Hole Alarms , system Backup, Kayaks, Motorcycles, Jet-ski, small boats, ATV, Lawnmowers, Generators, Electric Beds, Home Security Backup, Small Solar Systems, Trail cameras, Electric Fences and much more, it will fit any battery with at least one side or base with dimensions of 3.58 x 2.76 or smaller . Strap can be mounted in different directions to be able to adjust to the battery size, Spec: Weight 2.4oz with strap.