Oh yes... I have drilled 1/4" holes in the upper corner of the box..so much for water proof... I think that you need the hole to prevent pressure from building inside the box when they are out in the sun (try not to be). The pressure really puffs them. I also leave the batteries that I don't intend to use at home...
I am not sure if the pressure would reach bomb proportions without oxygen to fuel the lipo fire.
You have to be aware of the dangers of these batteries. I teach battery safety to students too!
ORIGINAL: HarryC
ORIGINAL: on_your_six
I have ammo boxes to transport and store my lipo batteries.
Do the boxes have vent holes? If a lipo did fire off it will release a lot of gas, turning a sealed box into a potential bomb.