Why Wall Phones Don't Need Batteries
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Wall phones do not need batteries or need to be plugged into a power outlet. Why is this? Because the average phone outlet has between 30 to 70 volts of electricity running through them. The type of electricity is AC (Alternating Current) which is what all house hold appliances run on.
Utilizing this Electricity
Here is a video that tells you how you can utilize this energy in emergencies. I would not recommend using this to charge cell phones or iPods. Here is why. When a phone rings, the electicity pulses. This is fine for what kipkay in the video suggests, but I would not risk the pulsing charge frying a expesive peice of equipement.
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