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 ...

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 ...

If a device stops working, it can be tough to tell if its battery has died or the product itself. There are easy ways to rule ...

Generally, the best 9v battery for a smoke detector may last anywhere from 6 months to 2 years. Meanwhile, 9V lithium batteries typically have a longer lifespan and may last up to 5 years or more.