https://newpower99.com/products/apple-iphone-6s-a1688-battery-replacement-kit. Part of the Complete Battery Installation Kit from NewPower99.com, this video provides a step by step demonstration of the procedure for replacing the battery in your iPhone 6s A1688 mobile phone. The Battery Installation kit contains a New High Capacity Battery, Battery Installation Video, and Special Tools required for battery replacement. Includes one year money back guarantee!