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Reviews around usb (5.00 of 5)
Besiter 20000 Portable Charger Quick Charge 3.0 High Capacity Dual Input and Dual USB Output Power Bank 20000mah LCD Display 12, 9, 5v External Battery Pack (Black)
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The efficiency of QC3.0 is obviously higher than smart usb
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OUT1 (Smart USB 5V/2.4A)Output Voltage
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Both micro usb and usb type-c ports support charging at 9V/2A. For better efficiency, I recommend to charge it with a QC charger or a PD charger if it’s compatible with QC.By the way, it will automatically cut off the power when all charging devices are fully charged
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By far this is my favorite usb power bank.
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