Marathon Watch Battery Replacement: A Comprehensive Guide For 2023

T5K751 Timex Resin Watch Strap for T5K751 Marathon Full Size Watch
T5K751 Timex Resin Watch Strap for T5K751 Marathon Full Size Watch from


In this fast-paced digital era, time is of the essence, and a reliable watch is a must-have accessory. Marathon watches have gained popularity for their durability and accuracy. However, like any other battery-powered device, the battery in a Marathon watch will eventually run out. In this article, we will provide you with a comprehensive guide on how to replace the battery in your Marathon watch in the year 2023.

Why Replace the Battery?

When the battery in your Marathon watch dies, the watch becomes useless until you replace it. Replacing the battery is a cost-effective solution compared to buying a new watch. It also allows you to maintain the sentimental value attached to your Marathon watch.

Tools Required

Before you begin the battery replacement process, make sure you have the necessary tools. You will need a small screwdriver, a pair of tweezers, a battery tester, and a replacement battery. Ensure that the replacement battery is compatible with your specific Marathon watch model.

Step-by-Step Guide

Step 1: Prepare Your Workspace

Find a clean, well-lit area where you can comfortably work on your watch. It’s a good idea to place a soft cloth or mat on the table to prevent any scratches to the watch or table surface.

Step 2: Remove the Watch Band

Depending on your Marathon watch model, you may need to remove the watch band to access the battery compartment. Use the small screwdriver to carefully unscrew the screws holding the watch band in place. Set the screws aside safely.

Step 3: Open the Watch Case

Once the watch band is removed, you can proceed to open the watch case. Use the small screwdriver to carefully pry open the back cover of the watch. Take your time and be gentle to avoid damaging any components.

Step 4: Identify the Battery

Locate the battery inside the watch case. It is usually a small, round silver disc. Use the pair of tweezers to carefully remove the old battery from its compartment. Take note of the battery’s orientation before removing it to ensure correct placement of the replacement battery.

Step 5: Test the Replacement Battery

Before inserting the replacement battery, use a battery tester to ensure its voltage is within the acceptable range. This step is crucial to avoid any issues with the watch’s functionality after the battery replacement.

Step 6: Insert the Replacement Battery

Once you have confirmed that the replacement battery is functioning correctly, carefully insert it into the battery compartment. Ensure the battery is placed in the correct orientation as noted earlier.

Step 7: Close the Watch Case

Gently press the back cover of the watch case into place. Use the small screwdriver to screw the case back into position. Be cautious not to overtighten the screws, as this could damage the watch case.

Step 8: Reattach the Watch Band

If you had removed the watch band, it’s time to reattach it. Align the holes on the watch case with the corresponding holes on the watch band. Use the small screws you set aside earlier to secure the watch band in place.

Step 9: Test the Watch

After replacing the battery and reassembling the watch, it’s time to test its functionality. Set the correct time and check if all the watch’s features are working properly.

Step 10: Maintenance Tips

To ensure your Marathon watch continues to function optimally, remember a few maintenance tips. Keep your watch away from extreme temperatures, moisture, and magnetic fields. Regularly clean the watch case and strap using a soft cloth. Lastly, replace the battery as soon as it shows signs of running low to prevent any potential damage to the watch’s internal components.


By following this comprehensive guide, you can easily replace the battery in your Marathon watch in the year 2023. Remember to work in a clean and well-lit area, use the correct tools, and be gentle throughout the process. With proper care and maintenance, your Marathon watch will continue to serve you reliably for years to come.