Power Banks: The One Feature That Actually Matters

The best power bank is useless if it doesn’t have Power Delivery (PD) with USB-C. This feature enables fast, efficient charging for modern phones, tablets, and even laptops, making a 20,000mAh bank dramatically more useful than one that only offers slow 10W output. Without PD, you’re stuck with slow charging speeds that can’t keep up with today’s devices.

What to Look For

When choosing a power bank, focus on these criteria that genuinely affect performance:

• Power Delivery (PD) support: This is the non-negotiable. PD allows higher wattage (18W to 100W+) and bidirectional charging. It’s the standard for USB-C devices, including iPhones (from 8 onwards), most Android flagships, Nintendo Switch, and many laptops.
• Output wattage: For phones, 20W is sufficient. For tablets and laptops, you need 45W or more. Check the wattage your device can accept; a 100W bank won’t charge a phone faster than 20W if the phone only supports 20W.
• Capacity (mAh): A 10,000mAh bank charges a typical phone about 1.5-2 times. A 20,000mAh bank does 3-4 times. For laptops, look for 20,000mAh or higher, as laptops have much larger batteries.
• Number of ports: At least one USB-C PD port and one USB-A port for older cables. Some banks have two USB-C ports, allowing simultaneous charging of a phone and a laptop.
• Pass-through charging: The ability to charge the power bank and your devices at the same time. Useful when you have limited wall outlets.
• Build quality and safety: Look for reputable brands with overcharge, over-discharge, and temperature protection. Avoid ultra-cheap no-name banks that may lack safety certifications.

Anker PowerCore 20K (with PD)

Strengths: Anker is a market leader in power banks, and their PowerCore series with PD offers reliable 20W output for phones and tablets. The 20,000mAh capacity is a sweet spot for travel, and the build quality is consistently good. It also features Anker’s MultiProtect safety system.

Trade-offs: The 20W output is not enough for most laptops. It also has a single USB-C port, so you can’t charge two devices with PD simultaneously.

Who it suits: Phone and tablet users who want a dependable, high-capacity bank for travel or daily use, without needing laptop charging.

RAVPower 20000mAh PD 60W

Strengths: This bank offers 60W PD output, which can charge most ultrabooks and MacBooks. It has two USB-C ports and one USB-A port, allowing you to charge a laptop and a phone at the same time. The 20,000mAh capacity is enough for a full laptop charge and a phone top-up.

Trade-offs: It’s heavier and bulkier than phone-only banks. The 60W output is not enough for high-end gaming laptops that require 100W+.

Who it suits: Professionals and students who need to charge a laptop and phone on the go, and want a single power bank for all their devices.

Baseus 65W 20000mAh

Strengths: Baseus offers a 65W PD output, which is slightly higher than the RAVPower, and often at a more competitive price. It features a digital display showing remaining capacity, which is a nice touch. It has two USB-C and one USB-A port, and supports pass-through charging.

Trade-offs: Build quality can be slightly less premium than Anker. The 65W output is still not enough for 100W+ laptops.

Who it suits: Budget-conscious users who want laptop charging capability and a display, without paying a premium for a top brand.

Zendure SuperTank Pro 26,800mAh 100W

Strengths: This is a high-end power bank with 100W PD output, capable of charging even the most demanding USB-C laptops. It has four USB-C ports and one USB-A, all with PD, and a smart display showing wattage in real time. It also supports pass-through charging at high speeds.

Trade-offs: It is expensive, heavy, and overkill for most phone-only users. The 26,800mAh capacity is close to the airline limit (100Wh), so it’s not ideal for international travel.

Who it suits: Power users with multiple devices, including a 100W laptop, who need maximum flexibility and speed.

Mophie Powerstation Pro AC

Strengths: This unique bank includes an AC wall outlet, allowing you to plug in any standard device, not just USB-C. It has a 24,000mAh capacity and 60W PD output for USB-C devices. It’s a versatile option for travelers who need to charge cameras, drones, or other non-USB devices.

Trade-offs: The AC outlet is limited to 100W total, so it can’t run high-power appliances. It is also bulky and heavy.

Who it suits: Travelers and photographers who need to charge a mix of USB and AC-powered devices without a wall outlet.

Anker PowerCore III Elite 26K (87W)

Strengths: This offers 87W PD output, which is enough for most 13-15 inch laptops. It has a 26,000mAh capacity and a compact design for its class. It also features a 60W input, so it recharges itself quickly.

Trade-offs: The 87W output is slightly below the 100W standard, and it’s still a large, heavy bank. It has only two USB-C ports and one USB-A.

Who it suits: Users with a 60-87W laptop who want a reliable, high-capacity bank from a trusted brand.

How to Choose

Start by determining your primary device. If you only need to charge a phone, a 20W PD bank with 10,000-20,000mAh is sufficient and affordable. If you have a tablet or a small laptop, look for 45-65W output. For a full-size laptop, you need at least 60W, ideally 100W.

Budget is a major factor. A good 20W bank can be found for under $30. A 65W bank with laptop support typically costs $50-80. A 100W bank with multiple ports can exceed $100. Decide if you need the extra wattage and capacity, or if a simpler, cheaper bank meets your needs.

Consider the trade-offs: higher capacity and wattage mean more weight and bulk. If you travel by air, remember the 100Wh (27,000mAh) limit for carry-on batteries. A 20,000mAh bank is generally safe, but check with your airline.

Also, think about the cables you already own. If you have USB-C to USB-C cables, a PD bank is essential. If you only have USB-A cables, a standard bank might work, but you’ll miss out on fast charging.

Frequently Asked Questions

Q: Can I use a power bank to charge my laptop?
A: Only if the power bank supports PD with sufficient wattage (at least 45W, preferably 60W or more). Check your laptop’s charging requirements.

Q: Is 10,000mAh enough for a day trip?
A: Yes, for a single phone. It will give you about 1.5-2 full charges, which is plenty for most users.

Q: What does ‘pass-through charging’ mean?
A: It means you can charge the power bank and your device at the same time. This is useful when you have limited wall outlets.

Q: Can I take a 20,000mAh power bank on a plane?
A: Yes, most airlines allow up to 100Wh (about 27,000mAh) in carry-on luggage. Always check with your airline.

Q: Why is my power bank charging slowly?
A: It could be due to a low-quality cable, the device not supporting fast charging, or the power bank not outputting enough wattage. Use a high-quality USB-C to USB-C cable for best results.

Q: How long does a power bank last?
A: Most power banks last for 300-500 charge cycles before capacity noticeably degrades. Storing them at moderate temperatures and avoiding full discharges can extend their life.

Bottom Line

If you’re buying a new power bank today, make sure it has USB-C Power Delivery. It’s the single feature that determines whether your bank can fast-charge a phone, charge a laptop, and remain relevant for years to come. For most people, a 20,000mAh bank with 20-30W PD is the best balance of size, capacity, and price. If you have a laptop, invest in a 60W or 100W model. Skip any bank that only offers USB-A output; it’s outdated technology.

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