[nativepaul]

Don't be too tempted to make a metal enclosure for Lipos, they come in soft polly pouches for safety reasons first not weight.

My dad was an electrical safety tester, responsible for giving out BS kite marks for the UK, one of the things came with AA size lithium cells, and in his effort to find dangers he put the 2 cells in a standard home nicad charger, and left them on an ovenight charge, he put the charger in a thin steel locker the type we have in schools and placed a screwdriver through the holes where the padlock would go.

On return in the morning he found the screw driver, stuck over 2 inches into a brick wall from where the door blew off and schrapnel from the bits of cell had blasted through the locker (creating more schrapnel) and bits of the metal cell cases and locker where all over the bunker, floor, ceiling, walls, the lot.

Its like gunpowder, you can put an ounce of powder on a plate and burn it in your hand but if you put it in a pipe and seal the ends, you have a bomb.

Theres videos of lipo fires and while they go up well and start fires, if your outside and one goes up 20ft away your prety safe, but stick one in a metal case and I wouldnt want to get within 100yds.

I think from memory those cells where 3.7v and 1200mah I cant imagine the destructive power of a 4s 8000 pack in a metal enclosure. Just dont Do it.