Do not worry about the shortage of battery pawer while using mobile devices while your outdoor activities :mountain ,beach and lake for hiking camping or fishing ,travel companion on your business trip or back trip.Please just take one piece of our new multifunction external portable power bank.Our external li-ion battery pack can apply power with hours of extended play time on ipod,PSP ,DV ,DC ,PDA, MP3,MP4,Mobile and other require 5V-7.4V digital devices. Do not worry about the shortage of battery pawer while using mobile devices while your outdoor activities :mountain ,beach and lake for hiking camping or fishing ,travel companion on your business trip or back trip.Please just take one piece of our new multifunction external portable power bank.Our external li-ion battery pack can apply power with hours of extended play time on ipod,PSP ,DV ,DC ,PDA, MP3,MP4,Mobile and other require 5V-7.4V digital devices. Specifications: Application range: Apple ipod MP3 all models, psp, PDA, cellphone. 1) chemistry: Li-ion cell, enjoys high capacity, free of memory effect. 2) output voltage: DC 5v, which can fit most of portable consumer devices, such as ipod, psp, cellphone, MP3 players... 3) output current:1a max. 4) capacity:12.5wh (3400mah) 5) charging time:6.5 hours 6) cycle life: At least 500 times 7) dimensions: L100 x w62 x h15mm 8) weight:130g, light weight 9) fuel gauge LED:1 LED indicator (red: Power is low, green: Power is enough) 10) standard accessories: Output cables, input cables, mini USB, psp, ipod and cellphone connectors are included( see attached photos about product details) 11) charging mode: Cc/cv 12) slim and beautiful design Features: 1) portable and powerful 2) slim design 3) excellent reliability and safety 4) memory effect free We supply other products: 12V/10-24Ah golf power batteries, 8.4V/500-800mA lithium battery chargers... Please email me at .cn