Evike.com gives us a test of the LIPO SAFE Battery Charging Container Bag which they carry under their Matrix brand which is designed to contain any unstable lipo battery catching fire whilst being charged... "The Matrix Tactical Systems LIPO SAFE Lipoly Battery Charging Bag is perfect for all airsoft batteries. The LIPO SAFE battery charging bag is easy to use and requires no maintenance. Manufactured with heat and flame resistant materials, the LIPO SAFE bag provides an added layer of protection and peace of mind while charging your airsoft lipoly batteries. It is always better to be safe, than to be sorry.

Instructions:

• Never leave charging battery unattended
• Always ensure the battery is being charged / stored on a non-flammable surface
• Ensure flap is sealed while charging
• The LIPO SAFE is intended to reduce the chances of damage in the event of a lipo fire.

Specifications:

• Dimension: 100mm x 200mm
• Application: For charging Tenergy Echo1 Firefox Matrix Venom Intellect and other lithium polymer lipo LiMn battery packs. Works great for all lipo battery, NiMh and NiCd batteries.

Attention: Batteries should never be left unattended while charging. The charger and battery should always be placed on a non-flammable surface away from all flammable materials. The buyer assumes all risk and responsibility associated with the intended use of this product. Refusal to follow the safety guidelines may result in personal injury and/or damage to property. The manufacturer and Matrix Tactical Systems assume no liability for failures to comply with the proper use and safety guidelines."