Best Power Banks 2026: 5 Compared on PD 100W and Capacity

Which one is right for you?

USB-C PD 100W: what it means and which devices it actually charges

USB Power Delivery (PD) 3.0 at 100W is the charging protocol that enables a power bank to meaningfully charge a laptop rather than merely trickle power into it. A MacBook Air (M3) requires 45W–67W to charge at useful speeds. A MacBook Pro 14-inch requires 70W–96W for meaningful charge under load. A Dell XPS 13 and Lenovo ThinkPad X1 Carbon both support 65W USB-C PD charging. Without at least 60W of PD output, plugging a laptop into a power bank while working will result in the laptop drawing more power than the bank provides — the battery continues to drain, just more slowly. At 100W PD output, all current consumer laptops except 16-inch MacBook Pro (which supports up to 140W) will charge at full speed from a power bank.

The Anker 737 supports USB-C PD at up to 140W on its primary port (PD 3.1 Extended Power Range) — the first power bank in this comparison to exceed the standard 100W limit. This matters specifically for the 16-inch MacBook Pro, which can fully charge from 140W. The Baseus Blade 100W, Zendure SuperTank Pro, and Mophie Powerstation Pro XL all support 100W PD via USB-C. The INIU B63 supports 65W PD — sufficient to charge most ultrabook laptops but not sufficient for charging a MacBook Pro 16 under load. The USB-C port output when multiple ports are in simultaneous use is the hidden differentiator: the Anker 737 drops its PD port from 140W to 60W when a second device is connected; the Baseus Blade splits total output across ports; the Zendure maintains 100W on its primary port while providing up to 30W on secondary ports simultaneously.

Airline carry-on compliance for power banks is determined by the International Air Transport Association (IATA) regulation, which limits each power bank to a maximum of 100 Wh (watt-hours) for carry-on without special approval. The relationship between mAh and Wh depends on cell voltage: Wh = (mAh × V) / 1000. At a standard 3.7V nominal cell voltage: 20,000 mAh = 74 Wh (compliant); 26,800 mAh = 99.16 Wh (compliant, near the limit); 30,000 mAh = 111 Wh (non-compliant for standard carry-on). The Anker 737 at 24,000 mAh × 3.65V = 87.6 Wh — compliant. The Zendure SuperTank Pro at 26,800 mAh = 99.36 Wh — compliant but within 0.64 Wh of the limit; some airlines have rejected it on inspection due to proximity to the limit, so carrying the product spec sheet is recommended. The INIU B63 at 25,000 mAh = 92.5 Wh — compliant.

Real capacity vs. rated mAh: why the numbers differ

A power bank rated at 20,000 mAh does not deliver 20,000 mAh to your device. The rating is measured at the internal cell voltage (typically 3.6V–3.7V). When power is converted by the bank's DC-DC converter to the output voltage your device receives (5V, 9V, 12V, 20V depending on the charging protocol), conversion losses of 10–20% are typical for good-quality power banks, and up to 30% for poor-quality drivers. A 20,000 mAh bank with 85% efficiency at 5V output delivers approximately 17,000 mAh of effective capacity at 5V — or approximately 15.3 Ah. At 20V (100W PD output), the same bank may deliver only 14,000 mAh effective capacity if the step-up DC converter efficiency drops further at higher voltages.

The practical benchmark is how many times a specific device charges from 0% to 100%. A standard iPhone 16 has an approximately 3,561 mAh battery. A Samsung Galaxy S25 has approximately 4,000 mAh. A MacBook Air M3 has approximately 52.6 Wh (approximately 14,220 mAh at 3.7V). With a 20,000 mAh power bank at 85% efficiency, you can expect approximately 5 iPhone 16 charges, 4.3 Galaxy S25 charges, or approximately 1.2 MacBook Air charges. The Anker 737 at 24,000 mAh provides approximately 1.4 MacBook Air charges or 5.8 iPhone 16 charges. The Zendure SuperTank Pro at 26,800 mAh provides approximately 1.6 MacBook Air charges or 6.4 iPhone 16 charges.

Recharge time from 0% to 100% matters for power banks that are used daily. A 24,000 mAh power bank recharged via a 65W USB-C PD charger will take approximately 2.5–3 hours to fully charge. Recharged via a standard 18W USB-C adapter, the same bank takes 6–8 hours. The Anker 737 includes a 140W pass-through charging port — you can charge both the power bank and a connected laptop simultaneously from a single 140W wall adapter. The Baseus Blade 100W supports 100W input for fast self-recharge. The Zendure SuperTank Pro supports 100W input, recharging to 80% in approximately 90 minutes with a 100W adapter.

What makes a power bank actually useful in travel and daily carry

Weight and form factor determine whether a power bank actually travels. A power bank that sits in a bag because it's too heavy or awkward to carry on a coffee meeting is not useful. The Baseus Blade 100W at 270g and approximately 11mm thickness fits in a jacket side pocket — genuinely pocketable for a 20,000 mAh bank. The INIU B63 at 498g is lighter than the Anker 737 (505g) and Zendure SuperTank Pro (490g) while providing more simultaneous charging ports. The Mophie Powerstation Pro XL at 680g is the heaviest in this comparison — justified by its MagSafe wireless pad but noticeable in a bag.

Simultaneous charging behavior is the most important operational detail for users who charge multiple devices. All five power banks in this comparison can charge multiple devices simultaneously, but the power distribution behavior differs significantly. The Anker 737 delivers 140W on USB-C port 1 alone; when you connect a device to USB-C port 2, it renegotiates and shares total budget — port 1 drops to 60W and port 2 gets up to 60W as well. For MacBook Pro users who also need to charge a phone simultaneously, this means the laptop charges more slowly. The Zendure SuperTank Pro maintains 100W on its primary USB-C port while providing 30W on port 2 simultaneously — a better simultaneous behavior for laptop-plus-phone charging.

Fast charge protocol support for the device matters. USB-C PD covers Apple, Google Pixel, Samsung Galaxy, and most modern laptops. Qualcomm Quick Charge 4+ (QC4+) covers older Samsung and Android devices. Huawei AFC (Adaptive Fast Charge) covers Huawei phones. All five power banks in this comparison support USB-C PD at some level. The INIU B63 additionally supports QC4+, QC3.0, AFC, SCP, and FCP — the most comprehensive fast-charge protocol support in this comparison for mixed-device households with older Android phones alongside modern USB-C devices.

The right power bank for the right use

The Anker 737 Power Bank (PowerCore 24K) at approximately $119 is the correct choice for MacBook and laptop users who need the fastest possible USB-C PD charging in a carry-on-compliant power bank. The 140W PD 3.1 EPR port is the only port in this comparison exceeding 100W — it fully charges a MacBook Pro 16 at full speed while also delivering meaningful power to a second device. The built-in display shows remaining capacity as a percentage rather than LED dots — more useful for planning around how many charges remain. The 87.6 Wh rating comfortably passes IATA carry-on compliance. Honest weaknesses: at 505g it is one of the heavier options here; the primary PD port drops significantly when a second device is connected; charging itself requires a 65W+ adapter for reasonable recharge speed.

The Baseus Blade 100W at approximately $79 is the correct pick for business travelers who need 100W laptop charging in the most packable form factor available. The credit-card thickness profile at 11mm and 270g makes it genuinely pocketable in ways no other 20,000 mAh power bank in this comparison achieves. The 100W PD output charges MacBook Air at full speed and MacBook Pro 14 at practical speeds. The 99.9 Wh rating clearly passes airline compliance. Honest weaknesses: 20,000 mAh is the smallest capacity in this comparison; the thin profile means the charging cable must be inserted at a specific angle because the USB-C ports are recessed into the edge; recharge via the included cable at 100W is fast but requires a high-wattage wall adapter not included in the box.

The Zendure SuperTank Pro at approximately $129 is the correct choice for photographers, videographers, and heavy mobile users who need the maximum legal airline carry-on capacity with simultaneous multi-device charging. 26,800 mAh (99.36 Wh) is the largest capacity in this comparison within airline limits. The simultaneous charging behavior (100W port 1 + 30W port 2 + 18W USB-A) makes it the best in this comparison for powering a laptop, camera battery, and phone simultaneously. A built-in LCD shows exact Wh remaining rather than percentage. Honest weaknesses: 490g is heavy for daily pocket carry; the proximity to the 100 Wh airline limit means some airlines have rejected it on visual inspection of the rating label — carry the spec sheet; the body runs warm during simultaneous multi-device charging.

The Mophie Powerstation Pro XL at approximately $149 is the correct choice for iPhone users who want the convenience of MagSafe-compatible wireless charging alongside USB-C PD in a single device. The integrated Qi2/MagSafe wireless pad eliminates the need for a separate cable when charging an iPhone — useful for bedside or desk charging where reaching for a cable is an inconvenience. The 25W USB-C PD port charges an iPad or small laptop at moderate speeds. At 20,000 mAh (approximately 74 Wh), it is well within airline carry-on limits. Honest weaknesses: 680g is the heaviest in this comparison — the wireless pad adds bulk; the 25W USB-C output is the lowest in this comparison and will not fast-charge a MacBook Pro or Air at full speed; MagSafe wireless charging output is 15W, which is slower than the 25W wired output.

The INIU B63 at approximately $35 is the correct pick for commuters and daily users who need to charge three devices simultaneously at the best value in this comparison. 25,000 mAh with three output ports (65W USB-C + 22.5W USB-C + 22.5W USB-A) means a phone, earbuds, and tablet can all charge simultaneously from one bank. QC4+, QC3.0, AFC, SCP, and FCP protocol support makes it compatible with virtually every fast-charge standard used in current Android and Apple devices. The LED display shows four power level indicators. Honest weaknesses: 65W maximum output means a MacBook Pro under load will charge slowly or plateau; build quality at $35 is functional but the exterior finish is plastic rather than aluminum; the three-port simultaneous behavior reduces individual port output — total simultaneous output is capped at approximately 90W distributed across all three ports.