Glossary / USB-C
Extended Power Range (EPR, 240 W)
The USB-PD tier that lifts charging from 100 W to 240 W.
Extended Power Range (EPR) is the USB Power Delivery tier that raises the ceiling from 100 W to 240 W, using voltages up to 48 V. It requires a 5 A EPR-marked cable. Without an EPR cable, charging is capped at 100 W no matter how powerful the charger is — a common reason a laptop charges slower than expected.
See it on your own cable — install Cablyst, check a cable, or browse the full glossary.
Related: E-marker USB Power Delivery (USB-PD) Thunderbolt 4 Thunderbolt 5 USB4 DisplayPort Alt Mode VDO (Vendor Defined Object) USB-IF (USB Implementers Forum) PDO (Power Delivery Object) SOP' (cable plug identity) UHBR (Ultra High Bit Rate) Active vs. passive cable