Apple Watch Series 8 41mm 282mAh Li-ion Battery

The Apple Watch Series 8 41mm Replacement Battery (Model A2819 / 282mAh) is a high-grade Lithium-ion replacement cell designed to swap out degraded, damaged, or swollen internal batteries in the 41mm Apple Watch Series 8.

Over time and continuous charge cycles, rechargeable watch batteries lose their initial capacity, leading to quick battery drop-offs, watchOS performance throttling, or unexpected shutdowns during workout tracking. Replacing your worn battery with this factory-tested cell restores all-day power endurance and ensures safe, consistent daily operation.

Key Features

• Factory-Grade 282mAh Capacity: Engineered to match exact Series 8 power specifications ($3.83\text{V}$, $1.08\text{Wh}$) for optimal daily runtime.

• Integrated Safety Protection: Features a built-in protection IC board to guard against over-charging, short-circuiting, overheating, and current surges.

• Solves Battery Degradation: Corrects maximum capacity warnings in settings, rapid power drops, or failure to charge properly on magnetic charging pucks.

Compatibility

• Apple Watch Series 8 – 41mm

  • Model Numbers: A2770 / A2772 / A2773 (GPS & Cellular variants)

• Battery Model Number: A2819

(Note: Not compatible with 45mm Series 8 models, or older/newer Series 7/9/SE/Ultra).

Technical Specifications

• Battery Model: A2819

• Capacity: 282 mAh

• Energy Output: 1.08 Wh

• Nominal Voltage: 3.83 V

• Chemistry: Lithium-ion (Li-ion) / Polymer

• Condition: Brand New

Note for Technicians: Replacing an Apple Watch Series 8 battery requires precision heating tools to loosen water-resistance screen adhesives, micro-spudgers to safely disconnect fragile ribbon cables, and replacement frame adhesive tape upon reassembly. Always perform 2–3 full charge and discharge cycles after installation to properly calibrate the battery level indicator.