Blue Pack S4 Battery/ Case for iPhone/iPod Touch Blue Pack S4 Battery/ Case is a versatile & functional flip up battery/case designed for the iPhone 3G & iPod touch 2G. Constructed using strong & stylish leather this battery/case is a versatile backup battery supply with plenty of power like supplying you with extend time of up to 3.5 hours talking time 7 hours for video playing 36 hours for music playing.:•1200m Ah Lithium polymer battery with protective case.• Charge/ Sync iPhone 3GS/3G/iPod touch 2G.• Adds 3 5 hours talk time.• Adds 7 hour Video playing• Adds 36 hours Music playing.• Compatible with iPhone 3GS 3G iPod touch 2G.• Hardware not included.• Manufacturers guarantee.