“Does this device charge up by plug into computer usb or car usb and hold charge to charge later or does it just use solar power for power to charge phones?”
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I charge this device in my car. I have not charged it using a computer. It will hold a four bar charge when charged in the car. I do not know how long it takes to fully charge.
Sorry, there was a problem. Please try again later.The solar panel isn’t intended as the primary source to charge your battery. It will provide emergency trickle charge for your phone to save your life. It would take +\- 100 hours of full sunlight (several days) to appreciably charge the battery pack via the solar panel. It’s primary and preferred charging method would be by a dedicated charger like one that comes with a cell phone. A computer or car USB will take less time to charge, but will still take many hours with its 1 amp output. You need to acquire a charger with an OUTPUT of at least 2.1 amps or greater, like a PD or QC 3.0 or the like (each mfr has its own proprietary name for fast charging) to charge the battery pack in 1/2 or 1/3 the time as a 1 amp power source.
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