Capacity fraud is rampant in local power banks. Every unit here is tested for real usable output — a genuine 20,000 mAh cell delivers roughly 12,000–13,000 mAh at the port after conversion loss, and we quote that honest figure.
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Voltage conversion from 3.7V cells to 5V USB loses 30–40%. A real 20,000 mAh bank gives ~12,000–13,000 mAh usable — about 2.5 charges of a 4,500 mAh phone.
Anything under 100Wh (roughly 27,000 mAh) is allowed in carry-on. The Wh figure is printed on each product page for exactly this reason.
PD models are filtered in the listing — they fast-charge phones and can even top up a laptop at 30W+ on the USB-C port.
Pay by bank transfer in advance, fast delivery nationwide. Power banks carry a 7-day checking warranty plus 3–6 months brand warranty on branded units.