If you're searching for an Anker power bank robust enough to handle power-hungry devices like the Steam Deck, ROG Ally X, or even a laptop, the model I personally use and highly recommend is currently on sale. Amazon is offering the Anker PowerCore 737 24,000mAh Power Bank with 140W Power Delivery for $87.99 after a 20% discount. This is the highest-capacity power bank I purchased for myself over two years ago, and it continues to perform flawlessly today—having accompanied me on numerous flights and road trips without any issues. While there are many reliable battery brands available today, Anker remains one of the most, if not the most, trustworthy options on Amazon.
Anker 737 24,000mAh 140W Power Bank for $87.99
Anker 737 24,000mAh Power Bank with 140W USB Type-C Power Delivery
$109.99 save 20% $87.99 at Amazon
The Anker 737 remains one of our top-rated Steam Deck chargers. This power bank is relatively substantial, measuring 4.6"x2.2"x2" and weighing 1.4lbs. It’s designed to be stowed in a travel bag or backpack rather than a pocket. It features two USB Type-C ports and one USB Type-A port. The USB Type-C ports support up to 140W of power delivery, meaning a single port can deliver the full 140W, or the two ports can distribute a combined 140W depending on the connected devices (for example, 70W + 70W or 100W + 40W).
In terms of gaming handhelds, the Steam Deck supports up to 45W charging, the Asus ROG Ally up to 65W, the Asus ROG Ally X and Legion Go up to 100W, and the Nintendo Switch and Switch 2 between 20W and 30W. This means the Anker 737 can charge and power all these gaming handhelds simultaneously.
The 24,000mAh battery translates to an 89Wh capacity. With an estimated 80% power efficiency (standard for most power banks), you get around 71Wh of usable charge. As a result, this power bank can fully recharge a Steam Deck (40Wh) or Asus ROG Ally (40Wh) from empty 1.8 times, an Asus ROG Ally X (80Wh) 0.9 times, and a Nintendo Switch 2 (20Wh) approximately 3.6 times. This clearly illustrates why a 10,000mAh power bank is insufficient for more demanding handhelds.
The Anker 737 is TSA-approved
According to TSA guidelines, power banks must have a capacity under 100Wh for carry-on luggage (they are never permitted in checked baggage). The Anker 737 safely complies with this at 74Wh. Its substantial size might attract occasional scrutiny, but you shouldn’t encounter any issues getting it through security. I’ve passed through many airport checkpoints and was only checked once—at Tokyo NRT—where it was cleared without any trouble.
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