On Mon, 20 Dec 2004 17:42:34 -0000, "Piers Hemy" <piers@xxxxxxxx>
wrote:
>
>But since voltage is the same for each cell, mAh can be substituted for Wh.
>Can't it?
Only if they're in parallel. In the camera, they're in series to give
a nominal 3V and a current-time capacity of 150mAh, so the combination
has an energy capacity of 450mWh. (If they were in parallel, we'd have
1.5V at 300mAh, still giving 450mWh as you say, but the camera
wouldn't work!).
In other words as an example, if the camera draws 15mA continuously it
would last for 10 hours.
John Gruffydd (Mold, Wales, UK)
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