Battery EB-BR890ABY 361mAh by Samsung Galaxy Watch 4 44MM Watch 4 Classic 46MM GH43-05066A Service Pack

Battery EB-BR890ABY 361mAh for Samsung Galaxy Watch4 44mm SM-R870 / Watch4 Classic 46mm R890 (SM-R870 / R890) GH43-05066A Service Pack

The EB-BR890ABY 361mAh battery for Samsung Galaxy Watch4 44mm SM-R870 and Watch4 Classic 46mm R890 is designed to restore the smartwatch’s original autonomy, stability and energy efficiency. This Service Pack module includes part number GH43-05066A, ensuring full compatibility with the technical models and precise fitting inside the internal housing. Its optimised chemistry provides stable charge cycles, solid thermal behaviour and consistent power delivery, maintaining the autonomy expected from Samsung wearables even under intensive use. Factory assembly ensures exact tolerances, firm connectors and proper internal protection, reducing installation risks and avoiding issues common in uncalibrated batteries. This replacement is aimed at professional repair shops requiring reliability, durability and safe integration in high-end smartwatches. Cold testing before closure and a full initial charge are recommended.

Key features
• Factory-assembled internal battery for smartwatches
• Compatible with Samsung Galaxy Watch4 44mm SM-R870 and Watch4 Classic 46mm R890
• Nominal capacity 361mAh
• Reference EB-BR890ABY · Part Number GH43-05066A
• Chemistry optimised for efficiency and low degradation
• Reinforced connectors and factory-level tolerances
• Designed for safe, stable professional repairs

Advantages and quality
The Service Pack quality ensures controlled charging parameters, thermal stability and full compatibility with the Watch4 power-management system. Its design reduces premature degradation, maintains stable autonomy and ensures reliable behaviour across daily charge cycles. For workshops, this module minimises post-repair issues, facilitates precise installation and provides a durable, professional finish, preventing sudden percentage drops or calibration issues. Available for immediate shipping from Spain.

Installation tips

1. Fully power off the watch before starting the repair.

2. Remove the back cover carefully using proper tools.

3. Do not bend or force the battery flex during installation.

4. Replace internal adhesives to maintain proper sealing.

5. Check charging coil, sensors and connectors before closing.

6. Perform a full initial charge after repair to stabilise percentage readings.

Technical table