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Aaoyun Direct via Amazon [amazon.com] has Aaoyun 10000mAh 22.5W PD Fast Charging Portable Power Bank w/ Built-In USB-C Cable (Grey) on sale for $12.99 – $3.12 off when you apply promo code 5UGZPM9Y at checkout = $9.87. Shipping is free w/ Prime or on orders $35+.

Note: Amazon promo codes don’t always apply seamlessly. If you run into this issue, try refreshing the page, re-entering the code, or checking after you select a payment method to confirm whether it already applied.