We offer External Battery For Laptop. OW-PPS-C49 capability:49Wh Output Voltage: 9V-12V(2A), 19V (3A) with USB output slot. Charge Time:about 3 hours Recommended Charge Temperature:0??~40?? Discharge Temperature:-20C~60C(Recommended: -10??~50??) Storage Temperature:-10??~40??(Recommended:-5??~35??) Cycle Life:more than 500 times Battery Pack Dimension:13.5x7.1x2.4mm Pack Net Weight:335g Accessories: output cables and convert tips Unit Packing:White box + Sleeve Application:Perfect power assistant for travelling, camping , exploration, fieldworker(telecome, army, education, mine, railway, agriculture, forester, ) 1. Portable IT and Digital Device:laptop, MP3, PMP, CD, Portable DVD, Portabe Printer, Portable TV, Digital Camera, PSP, PMP, ND, , Portable scanner, Portable Projection Instrument, Portable Acounstics, Transmitter-receiver, Video Tape Recorder, Portable Video Recorder, etc 2. Portable Testing Machine: Computation and Testing Instrument, Electric Testing Apparatus, Electrician Tesing Apparatus, Environmental Protection Testing Apparatus, Equipment Disgnose Testing Machine. 3. Portable Wireless:Wireless Gateway, Wireless Router, Wireless Bridge, Wireless Fitting, Wireless Meet Spot, Blue-tooth Adaper 4. Portable Camping Device:Warm Stove, DC electric Fans, Lantern, Caution Light, Fishing Light. 5. Portable Industrial Device and Portable Medical Treatment Device: Industrial Computer, X-ray Machine, etc. solar panel (selection) power: 20w size: 566*391*2mm(unfold) 69*46*11.5mm(fold) weigh: 2.4KG You can contact us if you want to order this product.