Best Laptop Power Banks for 2025 — What to Know Before You Buy

If you travel or work away from your desk, a high-capacity laptop power bank can be a game-changer. These portable chargers (typically 20,000–27,000 mAh) can refill phones multiple times, top up tablets, and get laptops from near-dead to work-ready in roughly an hour. Below is a concise guide on what matters and how we tested the units.

Flying with a laptop power bank

Most portable batteries are limited to 100 Wh for carry-on (about 27,500 mAh at 3.6V). Batteries are not allowed in checked luggage. Recent onboard battery incidents have led some airlines (Emirates, Southwest and others) to add further restrictions—check your airline before flying.

Capacity and real-world delivery

Look for at least 20,000 mAh to meaningfully charge a laptop. Note: the listed mAh is not what will reach your device. Due to voltage differences and conversion losses, a typical 25,000 mAh (≈92 Wh) bank usually delivers around 60–75% of a 5,000–6,000 mAh laptop battery—often about a ~75% charge in practice, with our testing averaging ~60% efficiency.

Ports & wattage

Large power banks normally include a mix of USB-C and USB-A ports; wattages differ by port. For fast laptop charging, prefer USB-C PD ports rated at 60W–100W—your device, cable and port must all meet the wattage to get top speeds. AC ports exist on some banks but are less efficient than direct USB-C delivery.

Wireless charging

Wireless pads on modern power banks have improved and can be convenient for phones, but are less efficient than wired charging and typically require devices to rest flat on the pad.

Design & portability

Expect laptop-level power banks to weigh ~1.5–2 lbs and be backpack-sized rather than pocketable. Many include battery-readout displays and multiple charging modes—use them to manage power across several devices.

How we tested

We tested dozens of banks with an iPhone 15, Galaxy S23 Ultra, M1 iPad Air and a 16-inch M1 Pro MacBook Pro. Devices were charged one at a time to measure how much capacity a bank actually delivered for a single-device refill. For laptops we started charging at ~10% battery to mimic mobile-office use.

Featured model: HyperJuice 245W

The HyperJuice 245W is a powerful 27,000 mAh option with four USB-C ports (up to 245W combined) and an OLED display. In our testing it brought a large MacBook to about 75% before depleting. It’s a premium, heavy-duty pick for serious multi-device users. (If you want to look for availability, try searching: HyperJuice 245W on Amazon — note it may not always be listed on Amazon.)

Quick buying checklist

• Capacity: ≥20,000 mAh for laptop support
• Port wattage: 60W–100W USB-C PD for fast laptop charging
• Carrying rules: keep power banks in carry-on and check airline policies
• Wired > wireless for efficiency
• Expect extra weight—check dimensions/weight if portability matters

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Note: original review content appeared on Engadget but has been summarized here. Links to the Engadget RSS have been removed.