Possiblility to increase the "percieved" efficientcy of a cell.

[TheNOP]

ok wel obviously i am not describing my intentions well enough... i will attempt it and display results...

maybe it is me that is not explaining myself clearly.

take 2 heating elements of 1000 watts each at 240 volts operating voltage

R = Vsquared / W    resistance = voltage * voltage / watts
one element resistance = 240 X 240 / 1000 = 57.6 ohm

2 elements in serie, resistance is 2 times bigger R = 115.2 ohm

I = V / R     current = voltage divide by the resistance
since resistance is 2 times bigger, currents will be 2 times smaller

so, what about the watts ?
W = Vsquered / R
240 * 240 / 115.2 = 500 watts for in series connection
250 watts for each element see above formula :  I = V / R


voltage accross the 2 elements is 240 volts.
so each element only have half the voltage, 120 volts.
if you want to calculate the voltages by yourself to see if i am right :

V = squarerootof(watt * ohm)
or
V = W / I
or
V = I * R

that mean, assuming the lowest resistance in your car(fan, pump,etc...) is the same as your cell,
you will need 2 times the voltage to make them(fan, pump,etc...) work correctly.
if the cell's resistance is higher, you will need an higher voltage then just 2 times.

note that a cell's resistance is not a fixe one.
just like a light bulb, the resistance change when currents is applyed to it.

[CrazyEwok]

i was going to let sleeping dogs lie but i think by leaving it people may think your misunderstandings are correct.... resistance in PARALLEL are voltage dividers and resistance in SERIES are current couplers. In other words the item which allows the least amount of current through will determine the current of the circuit... so in order for my idea to work you simply need to find a circuit on your car that uses the same amount of amps as your cell... might be kind of hard since your using a variable amount of current...
http://en.wikipedia.org/wiki/Series_and_parallel_circuits

[TheNOP]

resistance in PARALLEL are voltage dividers and resistance in SERIES are current couplers. http://en.wikipedia.org/wiki/Series_and_parallel_circuits

from the link you posted.

In a series circuit , the current through each of the components is the same, and the voltage across the components is the sum of the voltages across all the components.

series circuit = voltage divider
the voltage drop at each resistance base on its value.
current is the same for all resistances in the circuit.

In a parallel circuit, the voltage across each of the components is the same, and the total current is the sum of the currents through all the components.

parallel circuit = current divider.
the current sum is divided through each resistance base on its resistance value.