Apple says iPhone 6s and 6s Plus battery life may vary 2-3% regardless of Samsung or TSMC chip - 9to5Mac
iPhone 6S Plus Battery (Original)
Συμβατή Μπαταρία Αντικατάστασης 1715mAh για iPhone 6s | Skroutz.gr
IPhone 6s, max capacity 81% and battery still dies in 1 hour, bad battery? Grandma owned phone since it was bought new. : r/mobilerepair
Amazon.com: EMNT 4000 mAh Battery Compatible with iPhone 6s High Capacity A1633/A1688/A1700 Battery Replacement 【New Version】 with Repair Tool Kits and Instructions【2 Years Warranty】.! : Cell Phones & Accessories