TechRadar Verdict
The impressive ZMI No.20 is one of the best power banks money can buy.
I purchased this power bank personally and have used it for over two years.
The ZMI No.20 features two USB-C input/output ports and one USB-A port.
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The 25,000 mAh capacity is also nearly the largest allowed while still being flight-safe.
The long but slim form factor makes it easy to fit in bags, including backpacks and laptop bags.
While providing robust protection if dropped, the shiny plastic finish is prone to scratches.
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It sustains 100W output on a single USB-C port or 100W + 45W across both USB-C ports without overheating.
This makes it ideal for frequent, heavy use.
You use your power bank heavilyThe high-quality Samsung cells and premium build make it ideal for daily heavy use.
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All measurements and weights are personally verified, ensuring accuracy beyond the manufacturers listings.
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