Great for the field techs and campers! 6.0 batteries are best for it!
It's a great product! Quick cup of hot coffee, tea, chocolate, instant soups etc...
I reccomend the 6.0 batteries! A 3.0 full charged will brew one cup! The 6.0 will possibly get three, remember how things work! You're heating things by creating a controlled short circuit, it drains a battery quickly! Buy a few spares and enjoy!!!