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Old 05-24-2009, 05:02 PM   #2 (permalink)
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No. Think of voltage as analogous to pressure. If you're pumping up a tire, the pump pressure has to be higher than the pressure inside the tire, otherwise the air comes out, no?

What are you planning to charge it with, a solar panel or something like that, that has a variable voltage? Then you put a diode in the circuit, so the current only flows when the panel's outputting a higher voltage than the battery.
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