Renogy R-SP002 Manual De Instrucciones página 7

Recharged via the USB input port.
Use the included USB cables to recharge the portable charger through
electrical outlets or other power sources until all 4 LED Power Indicators
become solid blue.
Note: Suggest use chargers with QC 2.0 or QC 3.0. Can be recharged
simultaneously by QC Micro USB and USB-C with a maximum input of 33W.
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