one word - velcro. i use velcro for a lot of things. for small things like your battery, i think a little double sided would work fine. for larger packs, i use the velcro for strapping computer cords together. secure the loop into the fuse and you have a very good hold down system. with the latter, i usually put glue some thin foam where the battery rests to add friction so that it doesn't slide within the constraints of the velcro ties.