I can provide general guidance, but I might not have the latest information on specific service details. For the most up-to-date information, it's best to refer to Apple's official support resources or contact an authorized service provider.

If you wish to replace the battery in your Apple Watch Series 1, here are some general steps to follow:

  1. Check your warranty: If your Apple Watch Series 1 is still under warranty or AppleCare, it's recommended to contact Apple Support or visit an authorized Apple service center. apple watch series 1 battery replacement Attempting to replace the battery yourself could void the warranty.

  2. Gather necessary tools: If you're comfortable with DIY repairs and your warranty has expired, you'll need the appropriate tools for the job, including small screwdrivers and prying tools. Specialized toolkits are available for repairing Apple devices.

  3. Disassemble the Apple Watch: Carefully follow guides or tutorials that demonstrate how to disassemble your specific Apple Watch Series 1 model. Be cautious not to damage any internal components during this process.

  4. Replace the battery: Once the watch is disassembled, locate the battery and disconnect it from the watch's internal components. Replace it with a new, compatible battery.

  5. Reassemble the watch: After successfully replacing the battery, carefully reassemble the Apple Watch, ensuring all components are properly connected.

  6. Test the watch: Power on the Apple Watch and verify that it functions correctly. Check if the battery is charging and holding a charge as expected.

  7. Seek professional help if needed: If you're unsure about any step or encounter difficulties during the process, it's best to seek assistance from an authorized Apple service provider or a professional repair service.

Remember that working on electronic devices like the Apple Watch can be challenging and might require special skills and tools. If you're not confident in your ability to perform the battery replacement, it's better to have it done by a qualified technician. Additionally, tampering with the device may void any remaining warranty or AppleCare coverage.