best wholesale wooden portable power bank for smartphone mobile Item number:power bank wooden Compatible with most of mobile phones, tablets, digital cameras, MP3 and MP4 players Battery:Li-ion x1,grade A Capacity: 2000mah-3000mah USB output: 5V 800mA-1A USB input: 5V 800mA-1A Product size: 102x27mm Product weight: 65g Housing material:wooden Color:original wood color,walnut color Packing:small white box+Micro usb cable