Power Runner. 1.it is a universal external portable battery can match almost all 3C electronic devices, such as Laptops, Digital Camera, Camcorder, portable DVD player, PDA, Game-boy, Cellular Phone, MP3, etc. 2.adjustable output voltage range: PR2100/PR2220, 3V,4.5V,5V,6V,7.5V,9V, PR2310 3V,4.5V,5V,6V,7.5V,9-12V 3.Adopt Li-ion cell design, enjoys the benefits of no memory effect, no self-discharge, safe operation and high capacity(2~4 times capacity than original battery). Take PR2310 as an example, one full charge can take more than 1000pcs photos for digital camera. 4.4 pcs LED Capacity indicator lights acting as ?Fuel Gauge?, very smart design 5.4 pcs Standard DC Jack Plugs can match most of today?s mobile devices, also provide more than 20 types of DC Jack plugs and 10 types Cables for your choosing. 6.Easy to operate and conveniently to carry when you are your travel with a delicate belt-clip leather case, 4pcs Standard DC Jack Changers. 7.Can power and charge any portable device 8.Can avoid complex stock and overstocking your large money on batteries 9.Can save the old devices which cannot find replaced battery 10.Value added accessories include Travel Charger, Car Charger, DC Jack Plugs, Belt-Clip Leather Case, Output Wire.