If it were mine, I would have to discard it-- with that dent, cant be much aluminum thickness left in the dented area. When the battery heats when flying, it may become a fire issue a some point--
If you decide to keep it, put some JB Weld in that dimple flush it up with the surface and when it dries put a strip of aluminum tape over it. Always keep it in a fireproof location and keep an eye on it when you charge it... If the outside air gets to any leak, it it will catch fire.
If you decide to keep it, put some JB Weld in that dimple flush it up with the surface and when it dries put a strip of aluminum tape over it. Always keep it in a fireproof location and keep an eye on it when you charge it... If the outside air gets to any leak, it it will catch fire.