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Kenban, on the reversal effect--I would suspect Dell somehow limits the power draw on the USB lines to the standard 500 mA, charging the battery more slowly when on USB only. Don't know if you can test that or not. The wall lines, on the other hand, pull the full amounts you have measured. So, if we take the case of someone with a 5.4v, 850 mA power supply, if they plug in with the battery well discharged, it takes 630mA just to charge. If the Ax then draws another 400 mA to run, the total is 1030mA. Assuming no losses (yeah, I know) then the deficit is 180mA, which will be drawn FROM the battery, causing it to continue to decline even while theoretically "charging." Does that sound right?
On the FAQ question, if you write it and put it in a post, I'll make it sticky and then release this one to scroll off.
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