Quote:
Originally Posted by oldgeezer
Since an AA is 1.5 volts(as stated on the battery I'm looking at), then two of them would equal 3 volts. That's a third less voltage or power than a 9 volt, so my guess would be that the 9 volt would last longer.
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AA has a higher amp hours rating though (if I remember correctly).
The new system also has an LED running, which usually draws way more power than anything else.
I wouldn't be surprised if the new system has less life per battery, but I'm totally guessing.