Amazon is currently offering a Romoss 30,000mAh USB Type-C Power Bank with 18W of USB Power Delivery for only $19.99 after you clip a 50% off coupon on the product page. That's an excellent price for a pretty massive 30,000mAh power bank that's also equipped with a USB Type-C output with Power Delivery. This is a great battery backup for your Nintendo Switch, ASUS ROG Ally, Steam Deck or smartphone.
Romoss 30,000mAh USB Type-C Power Bank for $19.99
The Romoss 30,000mAh power bank has a larger capacity than most portable battery backups we've seen. The tradeoff is its size; it's a pretty hefty device, measuring in at 6.6 x 3.1 x 1.3 inches and weighing in at 1.5 pounds. A smaller 10K mAh power bank might be a better choice as a daily driver, however the extra battery capacity is useful for when you don't have access to a power outlet for longer periods of time. One of the unique features of this power bank is its variety of ports. There are Micro USB, Lightning, and USB Type-C inputs and USB Type-A and USB Type-C outputs.
The maximum amount of Power Delivery is 18W via USB Type-C, which also happens to be the max charging speed for the Nintendo Switch. The Steam Deck, on the other hand, supports a max of 38W and the ASUS ROG Ally even higher at 65W. If you want the most efficient charging for those gaming systems, there are better (and more expensive) options. If you're not in a rush, though, this power bank can still charge up all three without a problem, it will just take a little onger.
It's important to note that technically, the Romoss can't be brought onto the plane as carry-on. The maximum cutoff is 27,000mAh and 100Wh, whereas this powerbank is 30,000mAh and 111Wh. That said, this power bank is so similar in size to the 27,000mAh models and the capacity is just slightly over the threshold that it's unlikely anyone will stop you in the United States. The regulations may be stricter in other countries.
