Woot offers (2 PACK) Baseus 10,000mAh Portable Slim 20W PD QC Fast Charging USB-C Powerbank for $24.99 (orig. $37.98). Free shipping for Prime Members.

Product Description:
Baseus Portable Charger, Slim 20W USB-C Power Bank 10000mAh 20W PD QC Fast Charging Battery Pack, External Battery Compatible with any USB-C powered device.  

• 【Charge Fast Anywhere】Baseus Airpow portable charger supports 20W Power Delivery high-speed USB-C output, get iPhone 15 up to 50% charge in just about 30min, 3 times faster than standard 5W charging. It also supports PD18W and QC18W.
• 【18W Fast Re-charging】The USB-C port of this battery pack also supports 18W fast input. You can fully charge it in as fast as 2 hours and 48 minutes when you use the 18W charger to charge the battery to save your precious time.
• 【Ultra-thin and Portable】 Slim and compact design makes it the perfect portable power bank for travels, and easily fits into bags or backpacks, so you can stay powered for the journey.
• 【Emergency Backup Power】The 10,000mAh battery bank cell capacity gives you enough power to charge the iPhone 15 Pro Max 1.3 times, the Samsung S23 1.5 times, and the iPad mini 5 more than once.
• 【Share the Fun】Baseus BPS II charging technology allows simultaneous charging with both ports, get two devices fully charged at the same time, good for sharing with your friends and families.
• 【Safe Travels】Baseus USB-C power bank has 9 built-in safety protections to protect you and your device. It is allowed and safe to board with on any plane, so you won’t be caught on short of power when you are on the go.