Here is how to find out if your iPhone 6s is eligible for a free battery replacement
How long would iPhone 6 battery life be if the device was as thick as the original iPhone?
iPhone 6 Plus Battery (OEM Original)
More Photos Point Toward 1,810 mAh Battery for 4.7-Inch iPhone 6 - MacRumors
iPhone Battery With 1715 mAh Capacity Possibly Destined for 'iPhone 6s' or '6c' Appears - MacRumors
Original Genuine Apple iPhone 6S Battery Replacement - For iPhone 6S - 1715mAh | eBay
Amazon.com: SHENMZ Upgrade Battery for iPhone 6S, [3200mAh] 2023 New Version 0 Cycle Ultra High Capacity Battery Replacement for iPhone 6S Model A1633,A1688,A1700, No Tools : Cell Phones & Accessories
How to repair/replace iPhone 6s/6s Plus battery and display (Guides) - 9to5Mac
iPhone 6s Plus Battery - OEM Quality - MobileAdds B2B
Apple IPhone 6S Battery Replacement with 1715mAh Capacity-Black
iPhone 6S Replacement OEM Battery
Original Apple IPhone 6S Battery With 1715mAh (With Warranty), Battery Type: Lithium-Ion, Voltage: 3.82 V
AmpSentrix Professional Quality Replacement iPhone Battery (Unibody iPhones) | eBay