Iphone 6s originIphoneal battery

The iPhone 6s uses a built-in, non-user-removable lithium-ion (or lithium-polymer) rechargeable battery. It is designed to power the device through everyday usage (calls, internet, video, standby) and, like all lithium batteries, its capacity will gradually decline over time.

Key Specifications

Capacity: ~ 1,715 mAh. 

Approximate energy: ~ 6.91 Wh. 

Chemistry & Type: Li-Ion / Li-Polymer rechargeable, built-in (non-removable by user). 

Talk time (3G): Up to ~ 14 hours. 

Internet use: Up to ~ 10 hours on 3G/LTE; up to ~ 11 hours on Wi-Fi. 

Audio playback: Up to ~ 50 hours. 

Standby time: Up to ~ 250 hours (~10-11 days).