Original Battery 4s for Apple iPhone 4S A1431, A1387, A1387 Mobile Battery with 6 Month Warranty and high Capacity Battery Backup.Carefully Check Your Phone Model and Purchase. (for iPhone 4s) : Amazon.in:
How To: Replace the Battery on your iPhone 4s! - YouTube
Geniune Mobile Battery for iPhone 4S - 1430mAh
Winnerplusa Battery for iPhone 4s 3in1 : Amazon.ca: Electronics