- A) B9 R- l" V8 q3 S2 J iPhone4 Power Portable Back Up Battery Case (1400mah). W3 ~8 _* f9 r( n t: [9 f! F& j
' c$ l2 W* f; d. r( i 2 X! F# M$ r! g
; _; ~/ c6 [8 u: K1 s! m n
The Youtube video shows you how the back up battery case works for your iphone 4: http://www.youtube.com/watch?v=SRntwhMckB4&feature=player_embedded