How to replace the battery in your iPhone 5s - iFixit Repair Guide
How to replace your iPhone 5's battery [Video]
For iPhone 5S 5 Battery Case, Rechargeable Portable 2500mAh Backup Power Bank External Protective Charger Case For iPhone 5S / 5, Full Body Protection,LED Battery Level Indicator - Newegg.com
How to replace your iPhone 5 battery - iFixit Repair Guide