Overview

• The feature is live in watchOS 26 and appears when an Apple Watch detects suboptimal charging performance.
• Users see the alert in Settings > Battery, where slow charging is highlighted in orange and faster speeds in green.
• Apple says the warning signals potential for quicker charging rather than a fault with the current charger.
• For fastest results, Apple recommends a USB‑C Power Delivery adapter paired with the Apple Watch USB‑C Magnetic Charging Cable.
• Charging from computers, hubs, multi‑port adapters, or car ports typically provides lower output and leads to slower charge times.