How much longer bigger batteries last

Magnum said:
They last the same. respective of power draw.
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Going to need to see your research professor.


charlesxavier.jpg
 
Battery material has a specific energy density per volume. the same material is used by the same manufacturer. if a D cell has 10x more material, the power stored is 10X that of the AAA cell. but it is destined to be used at 10X the drain. That would mean both batteries last the same in their respective usage situations.

AAA cells in remotes last more than 10 years. but 4 x D cells last only 6 months in a radio.
 
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In my experience these findings are broadly correct, however at lower or fluctuating loads one tends to get a better lifespan. My rule of thumb is that Alkaline cells give 4-5 times the lifespan of a standard cell, and the D cell has 4-5 times the energy of AA. An AA Alkaline delivers 200ma when new, but this drops after a little use. The D cell can deliver a much larger current. The price per cell is a bit skewed, as with wholesale cells, the D is 4-5 times that of an AA. Therefore the AA gives a similar bang for your buck as the D cell does.
 
Magnum said:
Battery material has a specific energy density per volume. the same material is used by the same manufacturer. if a D cell has 10x more material, the power stored is 10X that of the AAA cell. but it is destined to be used at 10X the drain. That would mean both batteries last the same in their respective usage situations.

AAA cells in remotes last more than 10 years. but 4 x D cells last only 6 months in a radio.
Click to expand...

Bwahahahaha, clearly science isn't your strong point. :crylaugh:

Stick to baking classes.
 
I bought a multimeter a while back and when I tried to use it, it was dead. I opened the back and found that the battery had leaked really badly and damaged the circuit board to a point where it was beyond repair. Could be really interesting to know how many 'leakproof' batteries are in fact 'leakproof'.
 
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