Apple added a new notification system to Apple Watches with the watchOS 26 update. The watch now warns users when a charger not optimized for high-speed charging is used. With this feature, the Apple Watch will display a “Slow Charger” message in the Battery section of the Settings menu when it detects a situation where charging could be faster.

Apple Watch will notify users of slow charging

This warning system, introduced to iPhones with iOS 18, works similarly. Just like on iPhones, the Apple Watch displays charging status in colors. Fast charging is indicated in green, while slow charging is indicated in orange. This allows users to visually identify which adapter or charger is more efficient.

Apple states that this warning does not mean the charger is defective or incompatible. The company simply reminds users that there are alternatives that may offer shorter charging times. The slow charging warning is an important piece of information, especially for users who prioritize charging time during heavy daily use.

For faster charging, Apple recommends using a USB-C Power Delivery adapter and the USB-C Magnetic Charger included with the Apple Watch. These accessories provide the fastest charging for the Apple Watch. This feature, introduced with watchOS 26, helps users understand which hardware they can use to achieve the most efficient results.

Details regarding which Apple Watch models will support this feature were announced after the update was announced. The new system offers greater transparency into charging habits, directly impacting the user experience in terms of both battery life and charging time.