Apple 20W USB-C Power Adapter - 20W Output and USB-C Port

Apple 20W USB-C Power Adapter is a compact wired wall charger for iPhone, iPad, AirPods, Apple Watch, and other USB-C devices. The US model is identified as MHJA3AM/A, uses a single USB-C port, and supplies up to 20 watts of power.

Model And Charging Details

The MHJA3AM/A model has a maximum output of 20 watts. Best Buy lists the adapter at 1 inch high, 10 inches long, 0.67 inches wide, and 0.16 pounds, with a white finish and wired charging.

Apple lists the adapter at $19.00 (as of 09/24/2026). The adapter is sold without a charging cable, so the cable must match the port on the device being charged.

Compatibility And Package Contents

Best Buy lists compatibility with iPhone 8 and later, iPad Pro, iPad Air, AirPods, and Apple Watch models. With a compatible USB-C to Lightning cable, the adapter can charge supported iPhone models to 50 percent in approximately 30 minutes.

The box contains the USB-C wall adapter only. This separates it from charging kits that bundle a cable, and it also explains why the adapter's single-port design is aimed at one connected device at a time.

Price And Practical Limits

Target lists the same 20W adapter at $19.99 (as of 09/24/2026), while Best Buy lists the MHJA3AM/A model at $22.99 on its product page. Those prices place the Apple adapter near the manufacturer's listed price, although retailer pricing can differ.

Compared with Apple's 35W Dual USB-C Port Compact Power Adapter, the 20W model has one port rather than two and supplies 20 watts rather than 35 watts. The 20W adapter is therefore better matched to a single iPhone or smaller Apple device than to simultaneous charging or higher-power laptop use.

Verdict For Apple Devices

Apple 20W USB-C Power Adapter fits users who need one compact wired charger for an iPhone 8 or later, compatible iPad models, AirPods, or Apple Watch. Its measurable limits are the 20-watt ceiling, one USB-C port, and separate cable requirement.