Evolve

A typical cellphone battery is only around 3volts with a current of 13mA.

Power=VxA
so
P=13voltsX0.013amps
P=0.039watts

...there is not enough time and power to cook them.

Power=Energy(joules)/second
so
0.039W=Energy/10secs
therefore
Energy=0.39joules

i found that, a popcorn needs around 50joules of energy to pop..