Apple iPhone 8 (8G) Original-Capacity Replacement Battery (1821mAh)

The iPhone 8 battery (widely cataloged in wholesale mobile component markets as iPhone 8G) is an internal Lithium-ion cell engineered specifically for Apple’s premium glass-backed 4.7-inch smartphone. This generation introduces support for Qi wireless charging and relies heavily on the intelligent power balancing of the A11 Bionic chipset.

When your iOS Maximum Capacity drops below 80%, the operating system flags the cell under a degraded health profile and applies performance throttling to avoid unexpected phone shutdowns. This manifests as several daily performance issues: distinct stuttering during keyboard inputs, noticeable frame rate drops while scrolling media apps, rapid percentage drain under Wi-Fi/mobile data, and severe percentage skipping. Swapping in a fresh, premium replacement cell removes this bottleneck, restoring full CPU processing speeds and reliable all-day standby power.

• Battery Model: iPhone 8G / APN: 616-00357 (or matching structural variants)

• Battery Type: Lithium-ion (Li-ion)

• True Capacity: 1821 mAh

• Standard Voltage: 3.82V

• Charging Voltage Limit: 4.35V

• Fast & Wireless Charging Sync: Fully calibrated to handle original 18W USB-PD fast-charging protocols and standard Qi wireless inductive charging loops without triggering aggressive thermal throttling.

• iOS Battery Health Tracking: Formulated with an original-spec fuel gauge microchip that fully supports active iOS health telemetry (Settings > Battery > Battery Health) without prompting generic part error codes or “Unknown Part” pop-ups.

• Safety Integration: Includes a premium, built-in double-IC Protection Circuit Board (PCB) configured to prevent power surges, balance heat dissipation under load, and completely eliminate chemical expansion bloating.

• Device Compatibility: This exact 1821mAh structural footprint and its specialized logic board connector socket fit:

  • Apple iPhone 8 (Models: A1863, A1905, A1906, A1907)