9V batteries are often found in devices that aren ... cap with a switching voltage regulator to increase the voltage from 2.3V to 9V. With a light load the cap will last up to 3 hours and ...

a few of your instant messaged me the latest in powering your ipod with an external battery pack. this example, which is now making the rounds around the web is made out of an altoids case, 2 9v ...