Which iPhone Has the Best Battery Life? - Alvaro Trigo's Blog
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
Don't Run Out of Juice: How to Save Battery Life on Your iPhone | PCMag
Batterie iPhone 5S - C90
If your iPhone or iPad gets too hot or too cold - Apple Support