Best conventional USB-C pass-through: Anker 633 Magnetic Battery. Best wall-outlet pass-through hybrid: Anker 733 Power Bank, if you can find genuine US stock. “Pass-through” is not a universal feature: the 633 supports simultaneous charging through USB-C, while the 733 supports it from an AC outlet but not when recharged through USB-C.
What pass-through charging actually means
A pass-through power bank receives energy from a charger while sending power to a connected phone, tablet, earbuds or other device. Depending on the design, some input power first serves the connected device, some recharges the internal battery, and some is lost as heat. It does not guarantee the device receives the charger’s full wattage or that power will remain uninterrupted.
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At a glance
| Product | Verified pass-through path | Output and ports | Best use | Main limitation |
|---|---|---|---|---|
| Anker 633 Magnetic Battery | USB-C input while charging a compatible handheld device | 10,000mAh; USB-C input/output, USB-A output; USB-C up to 20W; wireless up to 7.5W | Phone-first portable charging, especially compatible magnetic iPhones | Not a high-power laptop bank; magnetic charging requires compatible alignment |
| Anker 733 Power Bank | AC wall input while charging connected devices | 10,000mAh/37Wh; up to 65W in wall-charger mode; 5V/3A total in battery mode | Hotel rooms, travel and desk use where an outlet is available | USB-C recharge pass-through is not supported; current US stock needs checking |
1. Anker 633 Magnetic Battery: best USB-C pass-through for phones
The 633 is the straightforward choice when you want to plug a USB-C charger into the bank and charge a phone at the same time. Anker explicitly documents simultaneous self-charging and handheld-device charging through its USB-C Power Delivery port. See the official product page and specifications.
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What you get
- Advertised capacity: 10,000mAh.
- USB-C input/output rated at 5V/3A or 9V/2.22A, with up to 20W output.
- USB-A output rated up to 5V/3A or 9V/2A; total output up to 5V/3.6A.
- Magnetic wireless output up to 7.5W.
- Dimensions of 4.21 × 2.61 × 0.71 inches and weight of 7.68 ounces (218g).
Magnetic versus wired charging
Magnetic attachment is convenient for a compatible iPhone or magnetic case, but it is slower than the wired 20W connection and can produce more heat. Non-compatible cases, metal plates, cards, wallets and movement can weaken or interrupt alignment. For speed, efficiency or heat control, use a cable.
#1 Best Overall
- Power Up in a Flash: Enjoy the convenience of a 20W USB-C Power Delivery port with this portable charger, charging an iPhone up to 3 times faster and keeping you connected during crucial moments. Ideal for those who need a quick power boost on the go.
- Effortless Charging Alignment: Benefit from the strong magnets of this MagSafe battery pack that ensure your device snaps into place for a secure, optimized wireless charging experience every time. Charging your phone has never been more convenient. Note: MagSafe-compatible wireless charging delivers up to 7.5W.
- View and Charge Simultaneously: The innovative 2-in-1 design of this MagSafe battery pack not only charges your devices wirelessly but also transforms into a foldable stand for hands-free viewing, enhancing your daily screen interactions.
- Travel Light with Power: Despite its compact size, this portable charger boasts a 10,000mAh battery capacity, capable of recharging an iPhone 13 Pro up to 1.8 times, making it an essential travel companion for keeping your devices powered up.
- What You Get: Anker 633 Magnetic Battery (MagGo), 2ft (0.6m) USB-C to USB-C charging cable, welcome guide, our worry-free 24-month warranty, and friendly customer service.p
Who should buy it
Choose the 633 for a compact, phone-focused setup: connect a USB-C wall charger to the bank, then charge your phone magnetically or by cable. Its ports can also power a second USB-A device, but it is not a high-output multi-device workstation or a sensible laptop-power recommendation.
Price and availability
Anker’s US pages showed a $59.99 list price with a $14 discount, while a collection page showed $45.99. These are dated price snapshots, not guaranteed prices. Check the current collection before buying.
Rank #2
- Power Up in a Flash: Enjoy the convenience of a 20W USB-C Power Delivery port with this portable charger, charging an iPhone up to 3 times faster and keeping you connected during crucial moments. Ideal for those who need a quick power boost on the go.
2. Anker 733 Power Bank: best AC pass-through hybrid
The 733 combines a wall charger and a battery. When plugged directly into an AC outlet, it can charge connected devices while replenishing its internal battery. Anker’s documentation and FAQ make an important distinction: simultaneous output is not supported when the 733 itself is being recharged through USB-C.
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| Mode | Documented capability | What it means |
|---|---|---|
| Wall-charger mode | Up to 65W total output | Useful for charging devices from an outlet while the battery tops up |
| Battery mode | Up to 5V/3A total | Portable output is far lower; do not market it as a 65W laptop battery |
The 733 accepts 100–240V AC input and is rated at 37Wh. Anker says it should generally travel in carry-on baggage, but airline rules control. Its current presence was not confirmed in the reviewed Anker US collection, so verify model number, seller, warranty and US availability before paying.
Rank #3
- Power Up in a Flash: Enjoy the convenience of a 20W USB-C Power Delivery port with this portable charger, charging an iPhone up to 3 times faster and keeping you connected during crucial moments. Ideal for those who need a quick power boost on the go.
Who should buy it
Choose the 733 if your workflow is “plug into a hotel or desk outlet and leave my devices connected while the backup battery replenishes.” Choose a different product if your required setup is USB-C-input pass-through, high-wattage portable laptop charging or guaranteed current retail availability.
How to set up each type of pass-through
Anker 633: USB-C pass-through
- Connect a USB-C wall charger to the 633’s USB-C port.
- Attach a compatible phone magnetically or connect a device by cable.
- Check that both the bank and device show charging.
- If charging cycles, remove metal accessories, try another cable or charger, disconnect extra devices and let the bank cool.
Anker 733: AC pass-through
- Plug the 733 directly into an AC outlet.
- Connect your phone, tablet or accessory to its charging port.
- Confirm the device is charging while the internal battery replenishes.
- Do not expect the same behavior when the 733 is recharged through USB-C; Anker says that configuration does not provide simultaneous output.
Safety, interruptions and troubleshooting
Pass-through creates extra conversion and heat. Some models omit the feature because mismatched input and output conditions can cause repeated power cycling; Anker explains this rationale in its 313 FAQ. Use suitable cables and the manufacturer’s recommended charger. Stop using a bank that becomes abnormally hot, swells, smells unusual or repeatedly disconnects.
Quick Recap
Best Value
- Speedy 30W Charging: Experience cutting-edge 30W fast charging technology—twice as fast as 5V/3A chargers. Boost an iPhone 16 Pro Max to 50% in just 27 minutes, compared to an hour with traditional power banks.
- Ready for Endless Use: Crafted for durability, the 5.4-inch built-in USB-C cable is tested to endure over 10,000 bends, ensuring it stands up to the rigors of everyday use.
- Mighty Compact Power: This powerful 10,000mAh power bank is only 4.32 × 2.58 × 0.98". It delivers up to 2 full charges for an iPhone 15, 1.94 charges for a Samsung S24, 2 charges for an iPhone 14 Pro, and 10 charges for AirPods Pro 2, making it perfect for travel. (Note: For iPhone 14 series and earlier, please use your own Lightning cable and connect it via the USB-A or USB-C port.)
- 30W Bi-Directional Charging: Enjoy two-way fast charging, a feature found in many Anker power banks, with up to 30W output and 20W input. (Note: Compatible with iPhone 15 Series, MacBook, Galaxy, iPad, Nintendo Switch, Steam Deck, and more.)
- What You Get: Anker Zolo Power Bank (10K, 30W), 5.4-inch (13.7 cm) built-in USB-C cable, 18-month warranty, and our friendly customer service.
Rank #4
- Power Without the Bulk: Experience the convenience of long-lasting power with Advanced Mini Cell Technology, featuring a compact Magsafe battery pack that doesn't sacrifice charging efficiency—ideal for on-the-go lifestyles as a portable charger.
- Effortless Charging Experience: Magnetic Alignment and Charging ensures your iPhone 16/15 snaps into place for a secure, efficient charge every time with this Magsafe battery pack—no more fumbling with cables during emergency situations or while traveling as a portable charger.
- Elegance in Your Palm: The Ultra-Slim Design at just 0.5 inch thin enhances portability and handling, making it a sleek companion for your iPhone 16/15 as a Magsafe battery pack that easily slips into your pocket or purse, doubling as a portable charger.
- View It Your Way: Enjoy hands-free video calls or streaming with the Versatile Viewing feature, thanks to the built-in foldable kickstand that supports your iPhone 16/15 in an upright position—perfect for home use or while on the move with this Magsafe battery pack and portable chrger.
- What You Get: Anker 622 Magnetic Battery (MagGo), 23.6 inch (60 cm) USB-C to USB-C cable, welcome guide, worry-free 24-month warranty, and friendly customer service.
- Brief pauses: USB-C Power Delivery may renegotiate when input is connected, and output can briefly stop or throttle.
- Low-power accessories: earbuds and similar devices can trigger trickle-charge or auto-shutoff behavior.
- Full phone: Anker says the 733 stops charging the phone once it is full; behavior varies by product and device.
- Recharge speed: Input wattage, battery level, device demand, cable quality, temperature and conversion losses determine the result. The 633’s quoted 1.8-hour recharge is an Anker test figure, not a pass-through runtime.
- Air travel: Carry power banks in cabin baggage and check your airline’s current rules. The 733’s listed 37Wh is below the commonly referenced 100Wh threshold, but airline policies can be stricter.
When neither pick is right
- For a laptop-first setup, seek a higher-capacity bank with documented USB-C Power Delivery output; neither model should be treated as a high-wattage laptop battery in portable mode.
- For uninterrupted equipment power, buy a dedicated UPS. Pass-through does not promise automatic transfer, regulated output or no-break operation.
- For a normal phone battery where simultaneous self-charging is unnecessary, a standard power bank may offer more capacity or lower cost.
- For newer magnetic charging standards, consider a Qi2 battery, but verify its exact pass-through input path rather than relying on the label.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
