Amazon.com: 4500mAh Built in Cable Cell Phone External Battery Pack, Portable Phone Charger Power Bank 5V 2.1A Charging Mobile Phone Charger USB-C In/Out Compatible with iPhone 6/7/8/X/11/12/13/14, Heated Vest : Cell Phones
iPhone battery replacement: Here are your options - CNET
Amazon.com: Amazon Basics Ultra-Portable Fast Charging Power Bank Battery, USB-C, 20100mAh with 18W PD and two 12W USB-A Ports for charging iPhone, Samsung, iPad, and more : Cell Phones & Accessories
iPhone battery replacement: Here are your options - CNET