Those things are usually quite bad with their voltages at the best of times but yeah, that one sounds buggered!

Also be aware if you're using a digital meter it puts almost no load on the power supply. If you really want to know what the voltage is you need to measure across the supply while it is powering whatever it is.

I was playing with my little powered USB setup yesterday and showing my friends my USB pen drive working. Unfortunately my low voltage warning LED started flashing after only a few minutes. I am sure the drive doesn't use that much power so I am going to try actually measuring the current drains of that and the keyboard I have (which I still can't get to work properly - Grrrrrrr!). I'll wire up a little USB extension lead made from the hacked up Nokia one so I can hook up my meter and measure the current. I will also check the current at the battery if I can. It could be the batteries weren't fully charged. I think the plug on my charger wall wart might be a bit touchy. I need another LED to show when it is charging I guess. Hmmm, actually a dual colour one might be nice.