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Posted by Charles Schuler on April 4, 2007, 5:24 pm
>2 AA brand-name alkaline batteries will power my toothbrush 2 minutes
> a day X 30 days= 60 minutes, tops. Actually, I see a power loss after
> about 15 days (30 minutes total).
>
> 2 of the same type of batteries in a home exercise ski-machine to
> power a monitor that shows time elapsed, calories, distance, and miles
> per hour for 180 minutes a week are still in use after three months!!
> 2,800 minutes?!!?
>
> Yet in a home-exercise air glider machine with a simpler monitor that
> shows elapsed time and no. of steps, the readout starts to fade after
> 150 minutes.
Battery capacity is measured in ampere-hours (Ah). So, if a device requires
1 ampere and the battery is rated at 1 Ah, you'll get an hour of use (1 x 1
= 1). If another device requires only 0.1 amperes, you'll get 10 hours of
use (0.1 x 10 = 1). That's a basic explanation, there are many other
factors.
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