# is it possible to boil water from room temp (20C) using regular batteries?

Hello everyone,

is it possible to boil water from room temp (20C) using regular batteries?

according to my research, to warm up 500mL of water by 10C within 10 minutes, it will take 1 battery (3.7V 3400mAh).

I have a feeling that's wrong but I used this formula and some others:

[500 grams * (Tfinal - Tinitial) * 4.186 J/g C ] / [E.battery]

is it possible to boil water from room temp (20C) using regular batteries?

according to my research, to warm up 500mL of water by 10C within 10 minutes, it will take 1 battery (3.7V 3400mAh).

I have a feeling that's wrong but I used this formula and some others:

[500 grams * (Tfinal - Tinitial) * 4.186 J/g C ] / [E.battery]

active| newest | oldest500 mL of water is half a kilogram, so you need 2.1

kilojoules per degree. You're going to need a whole lot of little batteries to make your tea. Or you can get a car battery (40 Ah at 12V, 1.73megajoules).how do i find the kj each battery has if i have the voltage and the capacity (mAh) given?

this way it will answer my initial question of how many batteries would be needed depending on the battery i use

I won't go through the numbers for you right now but with these you can calculate how much energy you need to evaporate your water. Compare that to what you can get from your power supply :)

E = [500 grams * (80 C) * 4.186 J/g C ] = 167440.0 so that is for the energy to heat the water.

I just want to heat it up and leave it, like say for tea.

my main question is, what battery capacity and voltage would be best to use to heat up water by 10C and by 80C, how do you calculate that?