Quote:
Originally Posted by Katsunami
For many devices, AA batteries don't provide enough power to provide a sufficiently long runtime. For example, one device I have here has a Li-ion battery, 1850 mAh battery at 7.4 volts, which is 13.69 Watts of power. A typical set of 4x AA rechargeable batteries provides 4x 2400 mAh at 1.2V, which is 11.52 Watts. (There are batteries that are more powerful, like 2600 mAh, or if you want to spend a lot, >= 2800 mAh.)
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I don't think your power calculations are right. You treated milliamp hours as if they were milliamps.
I don't know for sure, but I don't think the mAh rating of AAs changes how much current they can deliver at one time, and I suspect many Li-ion batteries deliver current that would make most AA chemistries burst into flames (figuratively if not literally) if they tried to keep up.