I need a battery that is rechargeable that I could use with a digital multimeter. I don't have a current budget yet but I believe it will need to be 1 at least 1 amp hour. This is because I plan on using a graphical LCD and it will draw more than the average DMM. I don't much care what the voltage is as long as I can charge it through a USB port. I would also like it to be widely available on the market.