How/why is it that two batteries with the same voltage may preform at different levels of power based on their amp hours? For instance, a 2Ah battery powering a weed eater at full charge, and the weed eater not working as powerfully as it would with a fully charged 4Ah battery?
Forgive me, I’m new to hobbies involving power tools but I’m excited to learn!
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They are not directly related.
Amp-hours is a measure of energy content of the batteries.
Power is a measure of how quickly you can use that energy.
To use a water analogy (NOTE: We will assume that the water is pressurized and maintains the same pressure in all examples)…
Amp-hours is related to the volume of your water tank. A larger tank would have a greater “amp-hour”.
Power is related to diameter of the hose you attach to the water tank. A larger hose will allow you to exert more “power”, but will deplete your tank quicker.
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