the Portable Energy,which are widely use for MP3, MP4, PDA, Mobile phone, Digital Camera, Camcorder, Laptop, etc. if you have any interestes,ples feel free to contact with me. FEATURES: 1. Charge or Power your Electric Devices Directly 2. Rechargeable Lithium-Ion Battery up to 500 Circles 3. 7.4 V DC and 5V-USB Output 4. Maximum 1.5A output to expand its applications 5. Energy Indicator Switch?4 level lights show working status 6. Built in Short Circuit and Overcharge Protection 7. Designed for PDA, MP3, MP4, Camcorder, Digital Camera, Mobile phones and Other Lower-Energy Consumer Electronics SPECIFICATION: 1. Capacity: 3400mAh, 3.7V 2. Input: DC-9.0V(AC 100-240V Power Adapter Included). 3. Output: DC-7.4V/1500mA, USB-5V/1500mA. 4. Size: 92*45*28mm 5. Net Weight: 110g 6. Working Temperature: -10°C-50°C 7. Charging Time: Approx. 6 Hours