If you need a high-capacity power bank without breaking the bank, Amazon's latest deal on the Iniu 20,000mAh 22.5W Power Bank is worth checking out. Currently priced at just $11.99 after applying the 50% off coupon and promo code UDC86U7K, this power bank offers exceptional value. Finding a 20,000mAh power bank at this price point is rare, especially one capable of delivering 22.5W USB-C fast charging (perfect for Nintendo Switch users). Iniu power banks receive consistently positive reviews while offering better affordability compared to equivalent Anker models.
INIU 20,000mAh 22.5W USB Power Bank

$32.99 save 64% $11.99 at Amazon
Use code 'UDC86U7K'
With its massive 20,000mAh (74Wh) capacity, this power bank provides substantial charging power. Accounting for 80% efficiency, here's how many full charges you can expect for popular devices:
- Nintendo Switch (16Wh): ~3.7 charges
- Steam Deck (40Wh): ~1.9 charges
- Asus ROG Ally (40Wh): ~1.9 charges
- Asus ROG Ally X (80Wh): ~1 charge
- Lenovo Legion Go (50Wh): ~1.5 charges
- iPhone 16 (14Wh): ~4.2 charges
- iPhone 16 Plus (18Wh): ~3.3 charges
The power bank features three output ports: one 22.5W USB-C and two USB-A with QuickCharge 4 support. The USB-C port delivers optimal 18W charging for Nintendo Switch and near-maximum charging speeds for iPhone 16 Pro Max (which peaks at 30W according to ChargerLAB tests).
Travelers can breathe easy - at 20,000mAh, it falls comfortably under TSA's 27,000mAh limit for carry-on items. Iniu backs the product with a solid 3-year warranty.
Need alternatives? Explore our guide to the best travel power banks.
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