If you're in the market for a power bank that can keep up with the demanding needs of gaming handhelds like the Steam Deck or ROG Ally X, Amazon currently has a stellar deal on offer. You can snag the Anker PowerCore 737, which boasts a 24,000mAh capacity and 140W output, for just $49.99. This deal is available through Woot, which is owned by Amazon, and it's a full $20 lower than the last price we reported. Having used this power bank myself for several years across numerous flights and road trips, I can confidently say it remains in top condition and is a highly recommended choice.

Anker 737 PowerCore 24K 24,000mAh Power Bank with 140W USB Type-C Power Delivery

$149.99 save 67%
$49.99 at Amazon

The Anker 737 stands out as one of our top picks for charging the Steam Deck. It's a bit on the larger side, measuring 4.6"x2.2"x2" and weighing 1.4lbs, so it's best suited for your travel bag or backpack rather than a pocket. It features two USB Type-C ports and one USB Type-A port, with the Type-C ports capable of delivering up to 140W. This means you can use a single port for 140W or split it between both ports, for example, 70W + 70W or 100W + 40W, depending on your devices.

When it comes to gaming handhelds, the Steam Deck can draw up to 38W, the Asus ROG Ally up to 65W, the Asus ROG Ally X up to 100W, and the Nintendo Switch up to 18W. The Anker 737 can charge all these devices at their maximum rates, allowing for simultaneous play and charge.

With its 24,000mAh battery, which equates to a 74Whr capacity, and assuming an 80% power efficiency (typical for power banks), you get approximately 59Whr of usable charge. This means you can fully charge a Steam Deck or Asus ROG Ally (both 40Whr) about 1.5 times, an Asus ROG Ally X (80Whr) about 0.75 times, and a Nintendo Switch (16Whr) around 3.7 times. This clearly demonstrates why a 20,000mAh capacity should be the minimum for power-hungry gaming handhelds like the Steam Deck, Asus ROG Ally, and especially the Ally X.

The Anker 737 is TSA-approved

The TSA allows power banks up to 100Whr in carry-on luggage, and the Anker 737, with its 74Whr capacity, fits comfortably within this limit. While its size might prompt a closer look at security checkpoints, it's been approved without issue in my experience, including at Tokyo NRT.

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