How Much Can a Battery Lift?

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Just theoretically I'd say the energy in a battery of 1.2V at 2.5 A for 3600 seconds would be...

(1.2 * 2.5) *3600 = 10800 J

So if Force * Distance = Energy then...

(1 kg)*(9.8 m/s^2)*d = 10800

then d = 1100 m

Only in theoretical deep space with no gravitational influence, friction or inertia to overcome...

You are better off using the available wattage, in your case 3W, as a precursor to mechanical power available. Then take out losses for conversion, i.e. magnetic / resistive / windage / friction etc. A reasonable estimate is 40% losses, so you end up with about 1.8W of available mechanical power. Insert that into whatever mechanical formulae you then need to move your object. Lastly, use the mAh rating to determine how long you can sustain that movement, then take the mechanical movement you came up with times the available time to get distance.

In other words, you can move something very very light for a (relatively) long distance or, with the proper gear ratio, something very heavy for a very short distance.

26ft....

260ft...?

www.allaboutbatteries.com/Battery-Energy.html

Thanks Kris - exactly the info I was after...

Thanks to other respondents too - (like all engineers, some were very useful, others were just plain innovative).

It all depends on how much weight training and body building it has done.

I suspect that the most efficient way might be to convert the sparks to heat and use the heat to expand something, thus providing the lift. From a theoretical point of view it ought to be possible to get very high efficiency, especially if you work on lifting a large mass a very small distance with a small temperature change.

Ignite some gunpowder things will really take off.

Great idea actually. If you think about it, an auto Air Bag is a small explosive charge (solid rocket fuel) that inflates that bag quite a bit with a tiny amount of electrical energy. Lots of chemical energy of course, but from the standpoint of what you can do with a battery, it's probably the most efficient.