I was in the same position as you destroyed a NEW 6s 6000mah. An expensive learning experience. I have now built a better battery tray out of 2mm aluminium, and padded it with neoprene. This keeps the battery tight in the case, and using a tie down strap instead of velcro means that it won't break free. I previously broke my gorilla maxx straps, hence the battery getting dislodged and trashed.