If your device is getting warm during usage or charging, then you need to replace the battery. For Apple iPhone 12 Pro Max A2466 3687mAh 3.83 V. For Apple iPhone 12 Mini A2471 A2227mAh 3.85V. l Compatible with Apple i Phone 12 mini / 12 / 12 Pro / 12 Pro Max.
IPhone 12 Pro Genuine Apple Battery Replacement Guide
WUHAO Battery for iPhone 12 Mini,2800mAh Upgraded Capacity for iPhone 12 Mini A2399 A2400 A2398 A2176 Replacement Battery with Screws and Professional Repair Tool Kit : Cell Phones & Accessories
WUHAO Battery for iPhone 12 Mini,2800mAh Upgraded Capacity for iPhone 12 Mini A2399 A2400 A2398 A2176 Replacement Battery with Screws and Professional Repair Tool Kit : Cell Phones & Accessories
iPhone 12 Pro Max Earpiece Speaker and Front Sensor Assembly Replacement - iFixit Repair Guide
WUHAO Battery for iPhone 12 Mini,2800mAh Upgraded Capacity for iPhone 12 Mini A2399 A2400 A2398 A2176 Replacement Battery with Screws and Professional Repair Tool Kit : Cell Phones & Accessories
iPhone 12 mini Battery Replacement - iFixit Repair Guide
TAYUZH [5000mAh Battery for iPhone 12 Pro Max High Capacity New 0 Cycle Replacement Battery for iPhone 12 Pro Max A2410 A2411 A2412 A2342 Installation Manual and Professional Repair Tools Kits
Repair & Spare Parts iPhone 12 Pro Max Parts
Apple raising prices of its battery replacement service for older iPhone models : r/iphone