Hands down the best battery available for the iPhone 6s, we have sold over 250000 Replacebase batteries since we introduced them to the market and they have become the number 1 battery for repair shops and end users due to the great performance that rivals even the original Apple battery, Our Replacebase iPhone 6s battery is made by leading manufacturers using the latest techniques, Japanese cells and second to none testing processes They are safety tested to the highest standards and are CE safety certified (unlike many on the market) - they are also RoHS compliant and we are able to provide an MSDS safety sheet if required and fully compatible with Apples built in Battery Health software. Includes bonding adhesive kit (for the battery and LCD reassembly) Capacity:1715mAh Cycle Life (rated to last):500-800 Charge Cycles Current Cycle Count:ZERO Charge Voltage:3.82v Weight:28g Rated Life:2-3 Years Cathode Material:Pure Cobalt Anode Materials:Graphite Cell Origin:Japan Cell Type:Li-ion Working Temperature:-20 / 50ºC Optimal Temperature:20-30ºC Compatibility: iPhone 6s A1633, A1688, A1700 This battery is covered under a 12 Month warranty.