Hello
first post be kind to me, I do have the biolite stove, it works for me, your burning time will and can vary with the wood you burn, the better the wood,hardwoods, the longer the burn, I have found that you don't always need to burn on high unless you need more output or to get dampish wood burning, the fan on low works fine for me, I cook and heat everything I want for myself, before you judge the biolite by someone else who hasn't tried or used, read and look at reviews, I will tell you that I am disappointed in their kettle pot, it takes to long to boil compared to my pots it makes a nice contained fire that is contained for cooking, their specs claim up to 19,000 btu,which I believe, and the usb charger does work,up to the stated milliamperes they claim, but that is just a plus in my book, nice that it's there but not the selling point, the concentrated burn, set it down unfold it , a little twigs and sticks takes you to hot food, thanks for your time, I do have other stoves, I'm not a light weight camper, I have mini,25 and 27 versions of the trangia,can't beat them, other various alochol burners, and propane burners, and like everything not one stove is suited for everyone, cheers