Can't tell you more than I told you already?
I ran a test on my home-made iPod battery pack. Just running the iPod at 50% volume through a playlist and otherwise not touching it, it will last 7.8 hours. By using the battery pack to recharge the iPod when its battery meter goes down to 1 bar out of 4 and charging for an hour I was able to 4 charges plus part of a 5th charge. This gave me a total of 27.7 hours including the 4.5 hours of charging when I was playing it too.
Read all about the test and the battery pack
I’m always looking for ways to invest. Lately gold has gone up a lot from $300 per oz a few years ago when all the countries were selling off their gold reserves up to $400 per oz now. So I was wondering how you can buy gold even though I’m not really seriously considering it (Motley Fool points out that if you bought $1 of gold in 1802 that today it would be worth $0.98 adjusted for inflation (however with the US on the gold standard, the value didn’t change by much until the 1970’s when the US finally let the currency float; it’s probably not fair to compare stocks and gold prior to 1971; US bonds would be worth $304; regular bonds $952; and stocks $599,605) but I wanted to know how it would work.