USB rechargeable batteries is a latest electric manufacturing item for multiple use, like computers, emergency flashlights, and mobile etc. If you have Blue tooth mouse or keyboard then it is a great idea for you. I am using AA size usbcell for my Bluetooth mouse, because normal Dry battery cell is not affordable and will expire within one week.
Many rechargeable batteries are available but usually have to buy a special kind of battery charger to recharge them. So USB rechargeable batteries is a good alternate solution. This would be the ultimate accessory to have when you’re out working in the field where your laptop or mobile charger are the only available power sources.[adsense]
USB rechargeable batteries (AA, 9V and mobile batteries) are available on www.amazon.com and price is just 30 to 40 $.