double batteries popular competitive power bank

product size:8.5*4.3*2.1cm  111g

full capacity (2pcs*18650 lithium batteries)

1800mah*2pcs=3600mah

2000mah*2pcs=4000mah

2200mah*2pcs=4400mah

2600mah*2pcs=5200mah

input:5V 1A; output: 5V 1A

compatible with all mobiles,iPhone,MP3/MP4,PSP,digital camera