Anker 737 Power Bank: Now $49.99, Save 70%

If you're in the market for a high-capacity power bank that can keep up with the energy demands of modern gaming handhelds like the Steam Deck or Asus ROG Ally X, Amazon currently has an unbeatable offer on the Anker PowerCore 737. Right now, you can grab this powerful portable charger for just $49.99—down from its usual price and even lower than the previous best deal we’ve tracked by around $20. Woot, the seller behind this deal, is a trusted Amazon-owned marketplace vendor, so you can feel confident in your purchase.

As someone who has personally used this exact model for several years, I can vouch for its durability and performance. It's been through countless flights and road trips without any signs of wear or decline in function. If you're looking for reliable, high-wattage charging on the go, the Anker PowerCore 737 delivers exactly that.

Anker PowerCore 737 24,000mAh 140W Power Bank – Now $49.99

The Anker PowerCore 737 is one of the most efficient and robust power banks available today, especially for powering high-drain devices like the Steam Deck and Asus ROG Ally X. Measuring 4.6 x 2.2 x 2 inches and weighing 1.4 pounds, it’s not something you’ll be slipping into your pocket—but it fits easily into a travel bag or backpack. Designed for serious travelers and mobile gamers, it features two USB Type-C ports and one USB Type-A port.

Each USB Type-C port supports up to 140W of power delivery, meaning you can either output the full 140W from a single port or split the wattage between both (e.g., 70W + 70W or 100W + 40W), depending on your connected devices. This makes it ideal for fast-charging multiple gadgets at once, including laptops, tablets, and of course, gaming handhelds.

When it comes to gaming handheld compatibility:

• Steam Deck: Supports up to 38W charging
• Asus ROG Ally: Up to 65W
• Asus ROG Ally X: Up to 100W
• Nintendo Switch: Up to 18W

Thanks to its high power output, the Anker 737 can charge all of these devices at their maximum supported rates—even allowing you to play and charge simultaneously on more power-hungry models like the ROG Ally X.

With a total battery capacity of 24,000mAh (74Whr) and an approximate efficiency rating of 80%, you get about 59Whr of usable power. That translates to approximately:

• 1.5 full charges for a Steam Deck (40Whr)
• 1.5 full charges for an Asus ROG Ally (40Whr)
• 0.75 full charges for an Asus ROG Ally X (80Whr)
• 3.7 full charges for a Nintendo Switch (16Whr)

Given the increasing power needs of modern handheld consoles, a 20,000mAh+ capacity should really be considered the baseline for anyone planning to game on the go—and the Anker 737 exceeds that comfortably.

TSA-Approved for Air Travel

Travelers will appreciate that the Anker PowerCore 737 meets TSA carry-on requirements, as its 74Whr capacity falls safely under the 100Whr limit. While it may draw extra attention due to its size during airport security checks, it’s completely allowed in carry-on luggage. Based on my personal experience flying internationally, including through Tokyo’s Narita Airport, this unit has never had an issue passing inspection.

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