You should never leave batteries charging unattended. 

Designed by engineers who know how dangerous a LiPo battery fire inside a home can be. The guys at Bat-Safe are RC enthusiast and came up with a safe and awesome solution to store, transport and most importantly charge your LiPo batteries.
With a double insulated steel fire proof box, fiberglass and steel wool filter to filter the smoke and soot combine these and you control the intense heat and arrest the flames.
Not only is the Bat-Safe box perfect for storing and transporting your LiPo batteries safety it's charging your batteries that make this battery box stand out from the others.
Install the connecting wires from the charger to the battery via the insulated fire collar, clip the easy to use latch and your battery is safe to charge with the piece of mind that your LiPo battery inside the Bat-Safe can never cause a fire when charging. The Bat-Safe has a magnetically attached hardpoint for your charger to mount directly on the lid, Lightweight with a carry handle make this a perfect, safe solution when charging, transporting and storing your LiPo batteries.  Protect your home and make sure you never have a fire that could destroy the fun of your hobby. 

Features:
• Designed by engineers and RC enthusiast
• Charging, storing and transporting LiPos
• Fireproof battery safe 
• Double steel insulated walls
• Fiberglass and steel wool filter 
• Stops flames and intense smoke
• Easy to use latch and seal
• Fire collar grommet for wires to connect from charger to battery
• Magnetically attached mount for charger 
• Piece of mind when charging your batteries
• Lightweight with carry handle

Specs:
Size: 300 x 220 x 160mm 
Internal Dimensions: 240 x 165 x 80mm
Weight: 1920g

You can charge 2x 6S 5000mAh batteries safely inside the unit.