EPR (Extended Power Range) is the part of the USB Power Delivery 3.1 specification that raises the maximum power a USB-C connection can carry from 100W to 240W. It does this by adding three new higher fixed voltages — 28V, 36V, and 48V — on top of the original 5V-20V range. Everything at or below 100W (20V) is now called SPR (Standard Power Range); everything above it, up to 240W (48V), is EPR.

What is the difference between EPR and SPR?

SPR (Standard Power Range) covers the original USB PD voltages of 5V, 9V, 15V, and 20V, delivering up to 100W. EPR (Extended Power Range) adds 28V, 36V, and 48V, delivering up to 240W. SPR is what every USB-C device has used for years; EPR is the newer PD 3.1 addition for high-power laptops. An EPR charger is fully backward compatible and will charge SPR devices normally.

How much power can USB-C deliver with EPR?

With EPR, USB-C can deliver up to 240 watts (48V at 5A). This is more than double the previous 100W ceiling (20V at 5A) and enough to run and charge high-performance gaming laptops and mobile workstations that previously required a proprietary barrel-plug adapter. The 240W figure is the maximum defined by the USB PD 3.1 specification.

What are the EPR voltages?

EPR adds three new fixed voltages above the standard 20V: 28V (up to 140W), 36V (up to 180W), and 48V (up to 240W). All three run at 5A, which is why the current limit stays the same as 100W charging — the extra power comes entirely from higher voltage. These sit alongside the original SPR voltages of 5V, 9V, 15V, and 20V.

Do I need a special cable for EPR charging?

Yes. EPR charging above 100W requires a cable that is e-marked specifically as EPR-capable and rated for 240W (5A at 48V). A standard 100W e-marked cable will not enable 140W, 180W, or 240W charging — it will cap the connection at 100W. EPR cables carry a dedicated 240W e-marker chip. Always check that the cable itself says 240W or EPR, not just '5A' or '100W'.

Which devices use USB-C EPR?

EPR is aimed at high-power laptops. The 16-inch MacBook Pro can draw up to 140W over USB-C using EPR, and many high-end Windows gaming laptops and mobile workstations now accept 140W-240W USB-C charging instead of a proprietary barrel plug. Phones and tablets never use EPR — they draw far less than 100W and stay within SPR.

Is EPR 240W charging safe?

Yes. EPR is designed with the same layered safety as the rest of USB PD: the charger, cable, and device all authenticate before any high voltage flows, and the required EPR e-marker cable confirms it can handle 48V/5A. If any component in the chain does not support EPR, the connection safely falls back to 100W or lower. There is no risk of forcing 240W through an incompatible cable or device.

Will an EPR charger work with my phone or older laptop?

Yes. EPR chargers are fully backward compatible with SPR. Plug in a phone, a MacBook Air, or an older USB-C laptop and the charger simply negotiates a standard 5V-20V profile at up to 100W. You only get EPR voltages when both the device and the cable explicitly support them, so there is no risk to lower-power gear.

What is the difference between EPR and PPS?

They solve different problems. EPR raises the ceiling of how much power USB-C can deliver (up to 240W) by adding higher voltages for laptops. PPS (Programmable Power Supply) makes charging more efficient at lower power by letting the charger fine-tune its voltage in tiny steps, mainly for phones. A high-end charger can support both — EPR for a laptop and PPS for a phone.

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What Is USB-C EPR? 240W PD 3.1 Extended Power Range Explained

Walter BartetUSB-C Research SpecialistUpdated July 20267 min read

For years, USB-C charging topped out at 100W — enough for most laptops, but not for powerful gaming machines and workstations that still needed a bulky barrel-plug adapter. EPR changes that. Part of the USB Power Delivery 3.1 standard, EPR (Extended Power Range) raises the USB-C ceiling all the way to 240W. This guide explains what EPR is, the new voltages it introduces, which devices actually use it, and — importantly — the specific cable you need to unlock it.

Quick Answer

EPR (Extended Power Range) is the USB Power Delivery 3.1 feature that raises the maximum USB-C power from 100W to 240W. It adds three new higher voltages — 28V, 36V, and 48V — on top of the original 5V-20V range. Everything up to 100W (20V) is now called SPR (Standard Power Range); everything above it, up to 240W (48V), is EPR. To use EPR above 100W you need an EPR-rated charger, a device that supports it, and a 240W e-marked cable.

Why EPR Was Added to USB-C

The original USB Power Delivery standard capped out at 100W (20V at 5A). That was plenty for phones, tablets, ultrabooks, and even a 14-inch MacBook Pro. But high-performance laptops — 16-inch MacBook Pros under full load, gaming laptops with discrete GPUs, and mobile workstations — regularly draw more than 100W. Those machines were stuck with proprietary barrel-plug chargers that couldn't share the universal USB-C ecosystem.

The USB Implementers Forum solved this in USB PD 3.1, released in 2021, by defining the Extended Power Range. Rather than pushing more current (which would require thicker, hotter wires), EPR keeps the current at 5A and raises the voltage. Power equals voltage multiplied by current, so jumping from 20V to 48V at the same 5A takes the ceiling from 100W to 240W without changing the cable's copper.

The practical payoff: a single USB-C charger and cable can now power a demanding laptop, and the same port still charges your phone. It is the final step in USB-C's goal of replacing every proprietary laptop charger with one universal connector.

EPR vs SPR: The Voltage Ladder

PD 3.1 splits USB-C power into two ranges. SPR is everything you already knew; EPR is the new high-power tier. Notice that the current stays at 5A throughout — all the extra power comes from higher voltage.

Range	Voltage	Max Current	Max Power	Typical Use
SPR	5V / 9V / 15V / 20V	Up to 5A	Up to 100W	Phones, tablets, most laptops
EPR	28V	5A	140W	16" MacBook Pro, thin-and-light gaming
EPR	36V	5A	180W	High-end gaming laptops
EPR	48V	5A	240W	Mobile workstations, top-tier gaming rigs

The 5A current stays the same

Because EPR keeps current at 5A, an EPR cable carries the same amperage as a 100W cable — it is the higher 48V that requires the special EPR e-marker rating. This is why you cannot just reuse an old 100W cable for 240W.

The EPR Cable Requirement (Don't Skip This)

This is where most people trip up. EPR charging above 100W requires a cable that is e-marked specifically as EPR-capable and rated for 240W. A regular 100W e-marked cable — even a good one — will not enable 140W, 180W, or 240W. It caps the connection at 100W as a safety fallback.

Every USB-C cable rated above 3A already contains an e-marker chip that tells the charger what the cable can handle. EPR cables carry a newer generation of that chip that specifically declares 240W / 48V capability. When shopping, look for the words "240W" or "EPR" printed on the connector or in the listing — not just "5A" or "100W."

The good news: many 140W and 240W chargers now include a matching EPR cable in the box, so you don't have to source one separately. Always confirm the bundled cable's rating rather than assuming.

EPR Chargers That Deliver 140W+

These are current in-stock EPR-capable chargers as of July 2026. Both use PD 3.1 to charge a 16-inch MacBook Pro or a high-power Windows laptop at full speed. Prices update automatically from Amazon.

UGREEN Nexode 140W GaN Charger (PD 3.1, 240W Cable Included)

BEST VALUE

This is the easiest way to get into EPR. It's a PD 3.1 GaN charger that delivers a full 140W to a 16-inch MacBook Pro or a compatible Windows laptop, and it ships with a matching 240W EPR cable in the box — so you don't have to buy one separately. Three ports and PPS support mean it also fast-charges a Galaxy or Pixel from the same brick.

PD 3.1 EPR, 140W single-port
240W EPR cable included
3 ports + PPS for phones

See Current Price on Amazon

Anker 140W 4-Port GaN Charger (Smart Display)

Anker's 140W brick is the premium desk pick. It hits 140W over PD 3.1 EPR for a 16-inch MacBook Pro, has four ports for a full device stack, and adds a smart display that shows live wattage per port — genuinely useful for confirming your laptop is pulling EPR power. Ships with a 5-foot cable.

140W PD 3.1 EPR, 4 ports
Live wattage smart display
Cable included

See Current Price on Amazon

For more picks and side-by-side detail, see our guides to the best 140W USB-C chargers, the 65W vs 100W vs 140W comparison, and the best USB-C accessories for the MacBook Pro.

Do You Actually Need EPR?

EPR is worth it if you have:

A 16-inch MacBook Pro — draws up to 140W over USB-C for fastest charging
A high-end gaming laptop that accepts 140W-240W USB-C charging
A mobile workstation for video editing, 3D, or CAD under sustained load

You can skip EPR if you have:

A 14-inch MacBook Pro, MacBook Air, or ultrabook — 100W SPR is plenty
Any phone or tablet — these never exceed 100W and never use EPR
A laptop that shipped with a 65W-100W charger — EPR gives you nothing extra

Bottom line:

EPR only matters if your laptop can actually draw more than 100W. If it shipped with a 140W or larger USB-C adapter, EPR is what lets a third-party charger match it. Otherwise, a good 100W charger covers everything you own. Not sure how much your machine needs? See how much wattage your laptop needs.

Charging a Phone, Not a Laptop?

EPR is for high-wattage laptops. If your goal is the fastest phone charging on a Samsung or Pixel, the feature you actually need is PPS — learn how it works next.

What Is PPS Charging?What Is an E-Marker Chip?

Frequently Asked Questions About USB-C EPR

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