Okay, so i have a 9 amp hr, 12v, lead acid battery that I am using to power a 12v dc fan. The fan uses 500 mA. In theory, and I know I'm new to this, I should be able to power the fan for roughly 9 hrs, reducing my charge 50%. When I run the battery through a potentiometer to recieve either 6v or 9v, is the fan still using 500 mA? I guess my question is, will my battery last longer? I'd like the fan to be less powerful and last longer.
Thanks
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