Hello there, we value your feedback on your upgrade from the iPhone 13 to the iPhone 16 pro- 1TB. We are really sorry to hear that the new device is not living up to your expectation and that the battery life is also the same as the old one, we would like to let you know that new iPhones generally have good battery performance, so this rapid drain is unusual and likely indicates an issue other than normal battery aging. if the phone shows unexpected battery percentage drops, there may be an underlying hardware or software issue, you can try the troubleshooting steps and check if it makes any changes for the battery life, at AT&T we aim to provide our customer with the best products that will fulfil all their satisfaction and requirements which is why we offer a wide range of products and you can contact us if you want to check or learn more about them meanwhile, you can also complete our self- service form: https://www.att.com/get-support/?source=ILC208383817 where our team of experts can get in touch with you to investigate on what might be wrong with the device battery. Here are the steps you can try from your end and check if it makes any changes for the device: 1.Restart your iPhone to clear minor software issues. 2.Update to the latest iOS, as Apple regularly issues fixes that improve battery performance. 3.Check battery usage in Settings > Battery to see which apps consume the most power and consider uninstalling or limiting usage of any abnormal apps. 4.Enable Low Power Mode to conserve battery during the day. 5.Lower screen brightness and enable Auto-Brightness. 6.Disable 5G or switch to LTE if you don’t need 5G connectivity constantly. 7.Reset All Settings (Settings > General > Transfer or Reset iPhone > Reset > Reset All Settings) if software behavior seems off. 8.Battery calibration: Fully charge to 100%, keep charging 2 more hours, then use the phone until it shuts off, and fully charge again uninterrupted.