[ASMR] How many more years can a discontinued iPhone 13‑mini last after a full deep maintenance?

This iPhone 13 mini belongs to a fan who prefers the compact grip of small-screen phones. After years of solid use, battery health dropped to 77% requiring 3–4 daily charges, and 256GB of storage was no longer sufficient. He sent it in for a high-capacity battery swap paired with a 512GB storage upgrade, with the rare iOS 16.2 system still intact. We cleaned the clogged speaker and earpiece mesh, upgraded storage via the polishing method, and installed a 2520mAh Tianyi high-capacity cell with an original zero-cycle flex cable — adding only 0.9g of weight. Airtightness is fully restored, battery health returns to 100%, and storage is expanded to 512GB. In a live-streaming test at 50% brightness and volume, it lasted 6 hours and 39 minutes, extending this classic compact iPhone for years more use.