I found a tiny power bank that charges two devices at once - for under $25
Briefly

Power banks require a balance between size and charge capacity. The 10,000mAh capacity is ideal for carrying in pockets and bags. The Voltme Hypercore 10K Pro is notable for its comfortable design with rounded corners and a grippy exterior, avoiding bulkiness while maintaining functionality. It features dual ports: USB-C and USB-A, facilitating fast charging and simultaneous device use. The overall design is practical and user-oriented, ideal for on-the-go charging without compromising convenience or comfort.
The Hypercore 10K Pro stands out for its 10,000mAh capacity, with a design that effectively balances aesthetics and functionality, making it suitable for pocket carry.
Casing combines soft grippy polymer with tough plastic, featuring debossed branding for additional grip, while rounded corners enhance comfort during use.
Its dual port system allows for a 30W USB-C maximum input/output and a 22.5W USB-A output, making recharging efficient and convenient.
The design's orientation of ports enables simultaneous use or charging while providing a user-friendly experience, differentiating it from bulkier models.
Read at ZDNET
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