Here is how to find out if your iPhone 6s is eligible for a free battery replacement
Nohon Battery For iPhone 6s iPhone6s 2300mAh-2400mAh Max Capacity Li-polymer Built-in Batteries +
Original Apple IPhone 6S Battery With 1715mAh (With Warranty), Battery Type: Lithium-Ion, Voltage: 3.82 V at Rs 1499 in Delhi
Μπαταρία OEM για Apple iPhone 6S 1715 mAh (616-00036)
KIQ 1715 mAh Replacement Battery (STANDARD) for Apple iPhone 6S A1633 A1688 A1691 A1700 + Repair Tools + Adhesive Strips - Walmart.com
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Μπαταρία για iPhone 6s, Li-ion 1710mAh 616-00033
Συμβατή Μπαταρία Αντικατάστασης 1715mAh για iPhone 6s | Skroutz.gr
Amazon.com: JUBOTY 5000mAh Battery for iPhone 6s Plus, Li-Polymer Internal New Upgraded 0 Cycles High Capacity Battery Replacement for iPhone 6s Plus Model A1634 A1687 A1699 with Professional Repair Tool Kit :
OEM Original Apple Battery for iPhone 6 6S 7 8 / 6+Plus 6S+Plus 7+Plus 8+Plus | eBay