Found by mif
It's an expensive way to cook but a lot cheaper than normal.
The Biolite Cookstove is usually about £75
Portable campfire burn sticks, twigs, pinecones & pellets
Control flames with air flow – four fan speed settings to control flame Size
Compact, nested design – store power pack in burn Chamber to save space
Integrates with Biolite cooking accessories works with the kettle and portable grill for all your outdoor cooking needs
Link for the Biolite Kettle Charge. This is usually about £100
10W On-Demand Power: Charge with the strength of a wall outlet
An audible alert sounds if the unit is getting too hot, helping to prevent accidental overheating.
Battery Boost: Stores power for a quick charge with no heat or water
Folding Power Handle: Packs flat and angles up for perfect pouring. 750ml Stainless Steel Kettle: Boil water for cooking, drinking, cleaning