back-up power case for iphone4/4s 1:capacity:1900mah 2:iphone4 external ... :popular in europe Back-up Battery case iphone 4/4s Features: 1) Battery and case in one 2) Double electricity. ... charge 7) Comfortable handfeel 8) USB Port 9)eight colours for optional: Black, White, Cyan, Magenta, Yellow, Red, Purple ... dimension:152 x 87 x 23mmGift box weight: 180g new arrival back-up power case for iphone4/4s