Solution to Charging Issues On Your COROS Watch Using the A1 Charging Port

Summer

Updated August 16, 2025 01:49

We've been gathering and listening to your feedback about the charging stability issues with some of our watches, and we want you to know we're committed to ensuring that your training and adventures are uninterrupted by technical hiccups. In this support blog post, we'll explain the problem, identify the affected models, and provide practical solutions to get you back on track quickly.

Understanding the Issue

Some users have reported challenges with the standard COROS charging cable, particularly after prolonged use. Over time, normal wear and tear—such as repeated plugging and unplugging, exposure to sweat, dust, or minor impacts—can cause the cable's connectors to become slightly loose. This may result in the cable not seating securely in the watch's charging port, leading to intermittent charging, slow power-ups, or the watch failing to charge altogether. This issue primarily affects watches with an A1 charging port released prior to the COROS PACE Pro, which features an updated design for enhanced durability. The affected models include:

COROS PACE 2
COROS PACE 3
COROS APEX (42mm and 46mm)
COROS APEX Pro
COROS APEX 2
COROS APEX 2 Pro
COROS VERTIX
COROS VERTIX 2
COROS VERTIX 2S

If you're using one of these models and experiencing charging difficulties, don't worry—we're here to help. Below, we'll outline step-by-step solutions to resolve the problem and prevent it from recurring.

Troubleshooting Steps to Try First

Before exploring replacements or adapters, start with these simple maintenance tips. Often, the issue stems from debris buildup rather than a faulty cable.

Clean the Charging Port and Pins:
1. Inspect the watch's charging port and the cable's metal pins for any dirt, lint, sweat residue, or corrosion.
2. Disconnect the cable from the power source.
3. Gently rinse both the watch port and cable pins under fresh water (avoid using soap or chemicals).
4. Allow everything to air dry completely for at least 30 minutes.
5. Reconnect and test charging. Ensure the cable clicks firmly into place.
Test with Different Power Sources:
1. Try a different USB wall adapter, computer port, or power bank. Sometimes, the issue is with the power supply rather than the watch or cable.
2. Avoid using fast-charging adapters not rated for low-power devices like smartwatches, as they may cause instability.
Position the Watch Securely:
1. Place the watch on a flat, stable surface during charging to minimize movement that could dislodge a loose connection.
2. If the cable feels wobbly, apply gentle pressure to hold it in place initially until charging begins.
3. Using a pair of pliers to gently pinch the charging cable connector can also ensure it fits more securely.

Additional resolution for affected users: If these steps don't resolve the issue, let's get you some assistance: After completing the above troublehshooting, please fill out THIS FORM and attach a brief video demonstrating the charging issue you are experienced. Once submitted, we will reach out to you at the email provided to assist with a resolution so you can get back up and running (with your watch) as fast as possible!

Thank you for taking the time to read and better understand the COROS charging experience, and for filling out the form if necessary. By addressing these charging concerns head-on, we aim to enhance your overall experience with our products. Stay tuned for more updates, and keep pushing your limits!