Sorry still not sure how to calculate all this power stuff, if you could help with that part too id appreciate it
Lets see if I can get this right;
Power is measured in joules (J).
But obvioulsy you can apply power over a long time or over a short time.
Energy is measured in watts (W).
A watt is a joule/s i.e. it is a measure of how fast power is being supplied.
Electric charge is measured in coulombs (C)
Electric potential is measured in volts (V).
A volt equates to a J/C
Current is measured in amperes (A).
An ampere is a coulomb/s C/s
From the above you can see that 1V x 1A
is 1J/C x 1C/s or 1JC/Cs or 1J/s i.e. 1W
(so volts times amps gives watts)
When looking at batteries you want to know how many amps they can supply for how many hours.