Exchangeable Battery for iPhone 6S+/6+, iPhone 6S/6?
Apple will replace your iPhone 6, 6s, or 7 battery for $29 even if it's not being throttled
Amazon.com: High Capacity Compatible with iPhone 6S Plus (5.5") Battery Replacement, Upgraded Battery for iPhone 6S Plus A1634 A1687 A1699 with Professional Repair Tools Set : Cell Phones & Accessories
Exchangeable Battery for iPhone 6S+/6+, iPhone 6S/6?
iPhone 6s Battery Replacement UK - FreeFusion Support
Exchangeable Battery for iPhone 6S+/6+, iPhone 6S/6?