I do have velcro on the bottom of my battery tray plus a strap that goes across the lipo length ways. I tried to put velcro on the bottom of the lipo but every time I would try to pull the battery off. It would pull the velcro off of it and I had attach another piece. I tried smaller pieces and larger pieces of velcro. I may try the padding and see how that goes. Thanks Duster_360 for the advice.