Apple iPhone 11 Pro Max Original-Capacity Replacement Battery (3969mAh)

The iPhone 11 Pro Max battery is a premium internal Lithium-ion cell designed in a massive single-piece L-shaped layout. This design maximizes space inside Apple’s 6.5-inch flagship chassis. At the time of its release, this design marked one of the largest generational leaps in iPhone battery life, engineered to perfectly supply stable current to the intensive A13 Bionic chipset and the large Super Retina XDR OLED display.

When your maximum battery capacity falls below 80% under Settings > Battery > Battery Health, iOS applies dynamic performance management (throttling) to protect the device from unexpected shutdowns under load. This degradation triggers typical performance bugs: noticeable lag when opening the camera or processing heavy apps, frame drops during system animations, swift percentage drops on mobile data, or the phone dying unexpectedly at 15% to 20%. Swapping in a fresh, premium replacement cell removes this software bottleneck, immediately restoring fluid system performance and original multi-day standby runtimes.

• Battery Model: iPhone 11 Pro Max / APN: 616-00653

• Battery Type: Lithium-ion (Li-ion)

• True Capacity: 3969 mAh

• Standard Voltage: 3.79V

• Charging Voltage Limit: 4.45V

• Form Factor: Large single-cell L-shaped structural block.

• Fast & Wireless Charging Sync: Fully calibrated to handle original 18W/20W USB-PD fast-charging protocols and standard Qi wireless inductive charging loops without overheating or causing thermal degradation.

• Safety Integration: Assembled with a premium integrated double-IC Protection Circuit Board (PCB) configured to protect the motherboard from voltage spikes, monitor heat metrics, and prevent chemical gas-expansion bloating.

• Device Compatibility: This exact 3969mAh physical footprint and terminal connector layout match natively with:

  • Apple iPhone 11 Pro Max (Models: A2161, A2218, A2220)