Apple Watch Series 9 41mm A2954 282mAh Original Battery

The Apple Watch Series 9 41mm Replacement Battery (Model A2954 / 282mAh) is a high-grade Lithium-ion replacement cell designed to swap out degraded, worn, or swollen original batteries in the 41mm Apple Watch Series 9.

Continuous charging cycles naturally degrade internal lithium-ion batteries over time, resulting in short operating runtime, sudden power-offs during active workout tracking, or watchOS performance throttling. Replacing your depleted cell with this factory-spec battery restores full daily power capacity and reliable operation.

Key Features

• Factory-Grade 282mAh Capacity: Engineered to match exact original specifications ($3.86\text{V}$, $1.091\text{Wh}$) for reliable, all-day power delivery.

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

• Solves Battery Degradation: Corrects low battery maximum capacity warnings in watchOS settings, rapid percentage drops, or failure to charge on fast magnetic chargers.

Compatibility

• Apple Watch Series 9 – 41mm

  • Model Numbers: A2978 / A2982 / A2983 (GPS & Cellular variants)

• Battery Model Number: A2954

(Note: Not compatible with 45mm Series 9 models [which use a 308mAh battery], or older Series 8/7/6/SE/Ultra).

Technical Specifications

• Battery Model: A2954

• Capacity: 282 mAh

• Energy Output: 1.091 Wh

• Nominal Voltage: 3.86 V

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

• Condition: Brand New

Note for Technicians: Replacing an Apple Watch Series 9 battery requires precision heating tools to soften water-resistant display seals, 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.