Quick answer
A 20W PD wall charger charges USB-C phones and tablets significantly faster than a standard 5W or 10W charger, but it offers no speed benefit for older micro-USB devices or basic e-readers.
How PD charging speed differs from standard charging
Power Delivery (PD) is a fast-charging protocol that lets a charger negotiate higher power with compatible devices. A standard charger typically delivers a fixed 5V at 1A or 2.1A, topping out around 10W. A 20W PD charger can deliver up to 20W over a USB-C connection, cutting charge time for phones like the iPhone or Samsung Galaxy by roughly 50% compared to a standard 5W brick.
The catch is that your device must support PD. Most modern USB-C phones and tablets do, but older gadgets or those with micro-USB ports will still charge at their normal slow rate. The charger itself won't damage them — it simply falls back to the device's maximum supported speed.
What you get with a 20W PD wall charger kit
A 20W PD wall charger often comes as a kit that includes a USB-C cable. The ToughTested 20W PD Wall Charger Kit, for example, bundles a 10-foot USB-C cable and a dual-port charger. The extra length is handy for reaching outlets behind furniture or across a nightstand, and the second port lets you charge a second device — like an older phone or earbuds — at standard speed while the main device fast-charges.
The trade-off is cost. A kit like this costs more than a basic standard charger, and the PD speed only matters if you own a USB-C device that supports it. If you're still using an older iPhone with a Lightning connector that doesn't support PD, or a micro-USB Android, you won't see any speed gain.
Trade-offs at a glance
- Charging speed: 20W PD charges compatible USB-C phones and tablets up to 2–3× faster than a standard 5W charger. Standard chargers deliver a steady 5–10W regardless of device.
- Device compatibility: PD only works with USB-C devices that support the protocol. Older micro-USB or Lightning devices without PD support charge at their normal slow rate.
- Included cable and ports: Many 20W PD kits include a long USB-C cable and a second standard USB port. A standard charger usually comes with a short cable and a single port. If you need a long cable or want to charge two devices at once, a kit adds real convenience.
- Cost difference: A 20W PD wall charger kit costs more upfront than a basic standard charger. The speed benefit only pays off if you regularly fast-charge a PD-compatible device.
Product facts
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ToughTested 20W PD Wall Charger Kit with USB-C Cable: 20W Power Delivery wall charger with a 10-foot USB-C cable and dual USB ports. You can fast-charge a USB-C phone while charging a second device at standard speed, and the long cable reaches distant outlets without an extension cord.
ToughTested 20W PD Wall Charger Kit with USB-C Cable
Which charger should you choose?
Best for
- Anyone with a USB-C phone or tablet that supports Power Delivery and wants faster daily charging
- Users who need a long cable and a second charging port for travel or bedside use
Not for
- People who only charge older micro-USB devices or non-PD Lightning iPhones — you won't see a speed gain
- Budget-focused buyers who don't need fast charging and prefer the lowest-cost option