... sound, Built - in Rechargeable Li-ion Battery; * Dual-power support for USB-powered computer,or lithium-ion battery-powered;* li-on Battery ... inside: (300mA,400mA,500mA,600mA,800mA,1000mA),just for your requirement . * Adopts improved amplifer circuit, produces more dynastic ... of sound;* Compatible with iPad, iPhone, iPod,MP3/MP4 Player,Mobile phone,PSP/PSvita,3DS/NDSi etc. via Audio in ...