As part of the Amazon Black Friday Sale, you can pick up the Anker PowerCore 737 24,000mAh 140W Power Bank at the best price I've ever seen. Right now theprice is down to $79.99 after a nearly 50% off discount. This is one of the best Steam Deck and Asus ROG Ally X chargers you can get. I've actually owned this power bank for over a year now for ROG Ally and my kids' Switches; it has been on multiple flights and road trips and is still lasting strong.Anker 737 24,000mAh 140W Power Bank for $79.99Anker 737 PowerCore 24K 24,000mAh Power Bank with 140W USB Type-C Power DeliveryThe Anker 737 is a hefty power bank, measuring 4.6"x2.2"x2" and weighing in at 1.4lbs. This is something you'd put in your travel bag or backpack instead of your pocket. It has two USB Type-C ports and one USB Type-A port. The USB Type-C ports support a maximum of 140W of power delivery. That means a single port could deliver 140W, or both ports will deliver a combination of 140W depending on which devices are plugged in (for example, 70W + 70W or 100W + 40W).In terms of gaming handhelds, the Steam Deck supports up to 38W of charging, the Asus ROG Ally up to 65W, the Asus ROG Ally X up to 100W, and the Nintendo Switch up to 18W. That means the Anker Prime can easily charge all three gaming handhelds even the ROG Ally X at their maximum rate; you'll even be able to play and charge simultaneously.A 20,000mAh battery equates to a 74Whr capacity. An 80% power efficiency rating (which is about standard for power banks) gives you about 59Whr of available charge. That means this power bank will charge a Steam Deck (40Whr) or Asus ROG Ally (40Whr) from empty to completely full 1.5 times, an Asus ROG Ally X (80Whr) 0.75 times, and a Nintendo Switch (16Whr) about 3.7 times. You can see here why we think a 20,000mAh capacity should be the bare minimum for more power hungry gaming handhelds like the Steam Deck and Asus ROG Ally (and especially the Ally X).The Anker 737 is TSA-approvedTSA states that power banks must be under 100Whr in capacity for carry-on (check-in is not allowed under any circumstances). This Anker Prime is safely under that at 74Whr. You might get checked simply because the Anker 737 is a hefty-looking power bank, but you shouldn't have any problems getting it cleared. I've gone through plenty of airport checkpoints and have only been checked once at Tokyo NRT and cleared without a problem.Alternative Deal: Anker Prime 20,000mAh Power BankAnker Prime 20,000mAh 200W Power BankClip the 40% Off CouponAmazon is also offering the Anker Prime 20,000mAh USB Power Bank for only $77.99 after you clip the 40% off coupon on the product page. This is the best price we've seen for 2024 (the previous lowest price was $89.99 on Amazon Prime Day). The Anker Prime is the successor to the Anker 737 with a couple of noticeable upgrades like a higher power delivery output (200W vs 140W) and a higher charging rate through USB Type-A (65W vs 18W).The Asus ROG Ally X Is the Best Windows Gaming HandheldNew ReleaseAsus ROG Ally X 7" 1TB Gaming HandheldThe Asus ROG Ally X was just released this past summer and has claimed the title as best Windows-based gaming handheld. It improves on the original ROG Ally in several ways, the biggest upgrades being a much bigger 80Whr battery with nearly the runtime, more RAM, a beefier cooling system, double the storage capacity on the base model, and better controls. It's not inexpensive starting at $799.99, but it's definitely an incredible piece of hardware.Should You Buy Now or Wait for Black Friday?Black Friday is only about a week away and in most cases it's better to wait to buy tech accessories. However, it's very unlikely that these two specific deals will get any better. Both the Anker 737 and the Anker Prime are already at their lowest historical prices, so we don't expect any further discounts to happen this year. However, if you're looking for a slimmer, smaller capacity power bank for travel, then you should definitely wait for more deals to drop on Black Friday.Eric Song is the IGN commerce manager in charge of finding the best gaming and tech deals every day. When Eric isn't hunting for deals for other people at work, he's hunting for deals for himself during his free time.