Charging chain checker
Find the weakest link in a USB-C charging setup.
Compare declared device demand, charger output, cable power, and protocol requirements. Use it before buying a replacement or when “100 W” is not charging like 100 W.
Your declared setup
How to use the result
The smallest declared power capability is the electrical ceiling. It is not a promise of live charging power. USB Power Delivery negotiation selects a mutually supported profile, while the device controls what it draws.
Before you enter a wattage
- Use the output for the exact charger port and active port combination, not only the large total printed on the charger.
- For more than 60 W, confirm a 5 A electronically marked cable. Current certified cable branding uses 60 W or 240 W markings.
- For phones, distinguish standard PD, PPS, and proprietary fast charging. A high cable rating cannot add a missing protocol.
Safety: wattage compatibility is not a product safety certification. Stop using visibly damaged, wet, unusually hot, or counterfeit equipment.
Related
Plan several devices on one charger · Troubleshoot slow or missing charging · Understand the full USB-C chain