I've got a few of those Lipo bags for charging and storing batteries but I really don't like them. I also charge my batteries inside the house because out here in the Texas heat, even in the garage it's too hot to safely charge. I don't just charge drone batteries though as I build my own 18650 and 21700 battery packs for other uses. Charging my home made packs and multiple drone batteries just doesn't work well in the small lipo bags so I decided to build one myself.
I started off with a fireproof document box with a 2000 degree rating. I then took Ceramic Fiber fireproof insulation with a 2400 degree rating and wrapped it in weld cloth that has an 1800 degree rating. This goes on all four sides as well as the lid which closes snuggly. For the base I used fireproof bricks (2700 degree) which are the same ones you use under a fireplace. The bricks are very lightweigt so you can still carry the box around with little effort. Your power cord is run out through the top maintain a seal once the lid is closed. This one stop the deadly smoke but it will keep the flames and heat in the box.
To test I took a torch to a section I used for proof of concept and tried to burn it. Worked very well. Since an average lithium fire from these batteries doesn't reach more than about 800 degrees I should be good.
Just thought I would pass this on for anyone worried about charging batteries inside or lives in an apartment and wants to keep things safe and have room to charge more than a couple batteries at a time.
I started off with a fireproof document box with a 2000 degree rating. I then took Ceramic Fiber fireproof insulation with a 2400 degree rating and wrapped it in weld cloth that has an 1800 degree rating. This goes on all four sides as well as the lid which closes snuggly. For the base I used fireproof bricks (2700 degree) which are the same ones you use under a fireplace. The bricks are very lightweigt so you can still carry the box around with little effort. Your power cord is run out through the top maintain a seal once the lid is closed. This one stop the deadly smoke but it will keep the flames and heat in the box.
To test I took a torch to a section I used for proof of concept and tried to burn it. Worked very well. Since an average lithium fire from these batteries doesn't reach more than about 800 degrees I should be good.
Just thought I would pass this on for anyone worried about charging batteries inside or lives in an apartment and wants to keep things safe and have room to charge more than a couple batteries at a time.