YILANS JM4 Pro 50,000mAh Power Bank, 22.5W with Four Built-In Cables

For a day away from an outlet with a phone, tablet, and earbuds to keep powered, the YILANS JM4 Pro brings a 50,000mAh battery, four built-in cables, and additional USB ports in one unit. Its digital display shows the remaining charge, while the listed maximum output is 22.5W for compatible devices and cables.

The built-in connectors are intended to reduce the need to pack separate charging cords. There is a tradeoff: at 1.1 pounds, this is a substantial battery to carry, and the manufacturer says its capacity exceeds typical airline carry-on battery limits. Check with your airline before planning to fly with it.

Tips for day-to-day use

This setup makes the most sense when you expect to charge several kinds of devices during a commute, trip, or outdoor outing. The built-in Type-C, iOS, Micro USB, and USB-A cables cover a range of connectors, and the separate USB-C and USB-A ports provide other ways to connect. YILANS describes the unit as capable of charging up to six devices at once, actual charging speed and results depend on the devices and connections being used.

For the advertised 22.5W fast charging, the connected device and cable also need to support that rate. The power bank itself recharges through USB-C, the manufacturer estimates about seven hours with an 18W-or-higher charger, so topping it up is something to plan ahead for rather than assume will be quick with any wall adapter. Buyers’ comments are mixed on charging speed and battery life: some appreciate the charging performance and how long it holds a charge, while others report slower recharging or fewer charges than expected.

Tech summary

• Model: JM4 Pro
• Capacity: 50,000mAh
• Power: Up to 22.5W
• Connectivity: Four built-in cables, one USB-C port and two USB-A ports
• Display: Digital charge-level display
• Color: Black
• Dimensions: 5.61 x 2.88 x 1.12 inches
• Weight: 1.1 pounds
• What’s included: Power bank, built-in cables, and user manual

Benefits

The main draw is carrying fewer loose accessories. Instead of selecting and packing a cable for every device, users can reach for one of the integrated connectors, with the extra ports offering another connection option. That can be useful in a shared setting, such as a road trip where several people need to top up phones or earbuds. Buyers also call out the convenience of the built-in cables and the ability to charge multiple devices, reactions to its size and weight are less consistent.

Compared with a smaller, lower-capacity charger, the JM4 Pro prioritizes a large stated capacity and multiple connection options over a light carry. Its dimensions are compact enough to fit in a bag, but the weight and airline restriction matter if your everyday carry needs to stay minimal. The stated capacity also does not translate directly into an equal amount of usable power at connected devices, the manufacturer notes that conversion losses reduce delivered capacity.

Should you buy it?

Worth considering if you want one battery pack for several devices and value built-in cables more than a lighter, simpler charger. The screen is useful for checking remaining charge, and the listed three-year manufacturer warranty is another detail to weigh when comparing options.

Not the best choice if you need a light power bank for a pocket or a straightforward airline carry-on setup. Its 50,000mAh capacity is identified by the manufacturer as above typical airline limits, and its 1.1-pound weight is a meaningful tradeoff for everyday portability. For travel by air, verify the applicable rules with the airline before bringing it.