Apple Watch Series 7 41mm 284mAh Original Li-ion Battery

The Apple Watch Series 7 41mm Replacement Battery (Model A2663 / 284mAh) is an authentic-grade Lithium-ion battery replacement designed to replace degraded, damaged, or swollen batteries in the 41mm Apple Watch Series 7.  

Over time, daily charge cycles cause lithium-ion watch cells to lose capacity, leading to shortened daily battery runtime, performance throttling under watchOS, or power loss during workout tracking. Replacing your worn cell with this factory-spec battery restores all-day battery endurance and power stability to your smartwatch.

Key Features

• Factory-Grade 284mAh Capacity: Built to exact original specifications ($3.83\text{V}$, $1.094\text{Wh}$) for reliable, long-lasting daily battery performance.  

• Integrated IC Protection: Built-in battery protection board prevents over-charging, short-circuiting, overheating, and power surges.

• Resolves Battery Health Issues: Corrects low battery maximum capacity warnings, rapid power drops, or failure to charge on fast-charging magnetic pucks.

Compatibility

• Apple Watch Series 7 – 41mm

  • Model Numbers: A2473 / A2475 / A2476 (GPS & Cellular variants)  

• Battery Model Number: A2663

(Note: Not compatible with 45mm Series 7 models, or older/newer Series 8/6/5/SE/Ultra).

Technical Specifications

• Battery Model: A2663  

• Capacity: 284 mAh  

• Energy Output: 1.094 Wh  

• Nominal Voltage: 3.83 V  

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

• Condition: Brand New

Note for Technicians: Replacing an Apple Watch Series 7 battery requires applying mild heat to loosen water-resistance screen adhesives, using micro-spudgers around delicate flex ribbon cables, and applying a replacement display seal adhesive upon reassembly. Perform 2–3 full charge and discharge cycles after installation to properly calibrate the battery gauge IC.