[lincpimp]

Some sort of positive hold down is a good idea. The repeated use of large amounts of velcro will most likely distort the pack, and without a strap wrapped around the pack cell shifting becomes a big concern. Hardcase lipos are a good idea for this, but I have seen the interior construction of the losi hardcase, and am not impressed at all. No padding and the cells are just floating free in there.

I would like to see a properly designed hardcase style battery box that has 4 locating pegs, one at each corner. Fixed male bullet connectors could be mounted to a plate on the chassis pointing upwards, with female connectors on the hardcase, facing downwards, like a trakpower pack upsidedown. An over center latch would hold the pack in place, and also have a lift up device built in to release the pack when the latch was disengaged. The four corner peg design would hold the pack front to back and side to side, and the latch would keep it from coming off the pegs. The peg desing takes the load off the latch and aligns the bullet connectors perfectly everytime. 5 sec battery swaps with this setup, no problem.

I need to whip up a prototype, most likely with wood blocks to show how it would work...