Most 20,000mAh power banks are the size of a paperback book and weigh enough to notice in a bag. This INIU model uses a high-density TinyCell battery to shrink that capacity into a pocketable form factor, and it comes with a built-in USB-C cable so there is one less thing to forget before leaving the house. It just hit its record low on Amazon, down to $29, off its $36 list price and open to all Amazon customers with no Prime membership required.
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45W output, built-in USB-C cable, three devices at once
The 45W output via Power Delivery covers fast charging for iPhones, Samsung Galaxy devices, iPads, and most USB-C laptops at full speed. INIU’s internal testing puts an iPhone 16 at 70% in 25 minutes and a Samsung S25 Ultra at 80% from flat, which makes this useful for a genuine top-up before a meeting or a flight rather than a slow trickle that barely moves the needle. The built-in USB-C cable handles the primary connection without occupying a port or requiring a loose cable to be packed alongside the unit. A USB-A port and a second USB-C port bring the total to three simultaneous charging connections, covering a phone, a tablet, and a third device at the same time.
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