$21 Power Bank: Fast Charge for Nintendo Switch, Steam Deck, Asus ROG Ally

If you're in the market for an affordable power bank that delivers fast charging for your Nintendo Switch, Steam Deck, or Asus ROG Ally gaming handheld, today’s deal is worth a closer look. Amazon currently offers the INIU 20,000mAh Power Bank with up to 65W Power Delivery over USB Type-C for only $21.59 after clipping the 40% off coupon on the product page. If the coupon doesn’t display automatically, try applying promo code "WN9GQJRA". INIU is known for offering high-quality portable chargers at competitive prices, often compared favorably to more expensive brands like Anker. This specific model has accumulated over 2,600 reviews on Amazon, holding a strong 4.5-star average rating, and earning a “B” grade from Fakespot.

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INIU 20,000mAh 65W USB Power Bank

• Original Price: $44.99
• Discounted Price: $21.59 (Save 52%)
• Available At: Amazon
• Promo Code: WN9GQJRA

This INIU power bank features a robust 20,000mAh (74Whr) battery capacity. Taking into account typical 80% efficiency, here's how many full recharges you can expect for popular devices:

• Nintendo Switch (16Whr): ~3.7 times
• Steam Deck (40Whr): ~1.9 times
• Asus ROG Ally (40Whr): ~1.9 times
• Asus ROG Ally X (80Whr): ~1 time
• Lenovo Legion Go (50Whr): ~1.5 times

Equipped with three output ports, this power bank ensures versatile charging options:

• One 65W USB Type-C port
• One 36W USB Type-C port
• One USB Type-A port with up to 18W of output

The 65W USB-C port is especially valuable—it supports the fastest charging speeds for most modern gaming handhelds. For those requiring even higher wattage (like the ROG Ally X and Lenovo Legion Go), it still matches the charging performance of their original AC adapters. Considering similar power banks typically max out at 20–30W PD, this unit represents a notably better-than-average value.

Also worth noting: if you own an Apple iPhone 16, this power bank will charge it efficiently, as ChargerLAB tests have shown the iPhone 16 Pro Max tops out at around 30W of charging speed.

Looking for Something More Budget-Friendly?

INIU 10,000mAh USB Power Bank

• Original Price: $24.99
• Discounted Price: $8.99 (Save 64%)
• Available At: Amazon

For those seeking a lighter option, this compact 10,000mAh power bank is available for just $8.99 when you apply both the 10% off and 40% off clippable coupons on the product page. It's uncommon to find a 10,000mAh model priced below $10, making this a smart purchase while the deal lasts. With this charger, you can fully recharge a Nintendo Switch approximately 1.9 times.

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