Iniu's 20,000mAh Power Bank Drops to $9.99 on Amazon

During its Spring Sale, Amazon has slashed the price of the popular INIU 20,000mAh power bank to just $9.99 after applying the 50% off coupon on the product page. Finding a 20,000mAh power bank for under $10 is extremely rare, especially one that supports 22.5W Power Delivery via USB-C—enough to fast charge a Nintendo Switch. INIU power banks consistently earn solid reviews and offer a more affordable alternative to comparable Anker models.

INIU 20,000mAh Power Bank for $9.99

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INIU 20,000mAh 22.5W USB Power Bank

$29.99 save 67% $9.99 at Amazon

This INIU power bank features a large 20,000mAh (74Wh) battery capacity. Assuming an 80% power conversion efficiency, here’s a rough estimate of how many full charges it can provide for popular gaming handhelds:

Nintendo Switch (16Wh): about 3.7 charges
Steam Deck (40Wh): about 1.9 charges
Asus ROG Ally (40Wh): about 1.9 charges
Asus ROG Ally X (80Wh): about 1 charge
Lenovo Legion Go (50Wh): about 1.5 charges

It includes three output ports: a 22.5W USB-C port and two USB-A ports compatible with Quick Charge 4+. This configuration supports fast charging for the Nintendo Switch at up to 18W, and it can also charge an iPhone 16 at close to its top speed (ChargerLAB tests show the Pro Max can draw up to 30W).

Thanks to its compact size, this power bank won’t be an issue at airport security. Its 20,000mAh capacity falls comfortably under the TSA’s 27,000mAh carry-on limit. Measuring just 5.3 x 1 x 2.7 inches, it’s discreet enough to avoid drawing attention.

Looking for more options? Check out our guide to the best power banks for travel.