Why Your USB-C Cable Isn't Fast Charging and How to Fix It

Quick answer

A USB-C cable that won't fast charge usually has one of three causes: the cable doesn't support the required power delivery spec, the charger isn't powerful enough, or your device's fast charging isn't enabled. Start by checking the cable's specs.

Step-by-step diagnosis

• Symptom: Your device charges slowly even when plugged into a fast charger. For example, a phone that normally fast charges in 30 minutes takes over an hour.
• Likely cause: The cable does not support USB Power Delivery (USB-PD) or is rated for a lower wattage than your charger delivers. Basic USB-C cables often cap at 15W or 60W, while fast charging may require 18W, 30W, 45W, or more. Check the cable's packaging or specs for 'USB-PD' and the wattage rating. If it's not listed, assume it's a standard-speed cable.
• Corrective action: Replace the cable with one that explicitly supports USB-PD and the wattage your charger provides. For most phones, a 60W-rated USB-C to USB-C cable like the Juice USB Type-C to USB-C Charging Cable 1m is sufficient. For laptops, look for a 100W-rated cable. After swapping the cable, test the charge speed. If it still doesn't fast charge, move to the next step.
• Next check: charger and device: If the cable is correct, verify that your charger outputs enough wattage (check the label on the charger brick) and that your device's fast charging feature is enabled in settings (e.g., 'Fast charging' or 'Super fast charging' on Android; iPhones fast charge with 18W or higher USB-PD chargers). If both charger and device are fine, the cable was the problem. If not, consider a different charger or check for device-specific limitations.
• When to stop or choose another option: If you've tried a USB-PD cable, a compatible charger, and enabled fast charging on your device but it still charges slowly, the issue may be with the device itself (e.g., battery health, port damage, or software bug). At this point, contact the device manufacturer or consider a professional repair.

Cables that can help

• Juice USB Type-C to USB Type-C Charging Cable 1m: The Juice USB Type-C to USB Type-C Charging Cable 1m is designed for faster charging and syncing via USB-C. If your current cable is a basic USB-C to USB-A type, switching to a USB-C to USB-C cable like this one can enable fast charging that your old cable couldn't support.

  

• Juice USB Type-C Charging Cable 1m: The Juice USB Type-C Charging Cable 1m offers standard charging and data transfer, available in Coral or White. This cable is a good choice for everyday charging when you don't need fast charging, but it won't solve a slow charging problem caused by insufficient power delivery specs.