How long does it take to charge devices with the CampStove?

The CampStove is compatible with most devices that can be charged through a standard USB port. This includes cell phones, smartphones, MP3 players, LED flashlights, headlamps, and rechargeable battery packs, among other devices. Please note that not all manufacturer’s products may be included. 

Charging times vary by device, as well as by the strength of the fire and other variables like outside temperature. For an Apple iPhone 4S (2G), 20 minutes of charging with a strong fire can provide you with 60 minutes of talk time.