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A119S/ USB Charger Voltage Per Port?

Seeking some information regarding the USB Charger for the Viofo A119S in supplying 3.1 amps. There are two USB ports on the charger, one most likely low voltage and the other high. My question is, is the 3.1 amps per usb port or in total? I would like to use an additional 119S for rear window using the same charger. Would there be enough voltage to power both cameras without any issues? Any and all responses are truly appreciated.

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The included cig-lighter power adapter is specs at 5volt 3.1amp with port closest to blue led as 2.1amp the other 1amp. I wouldn't recommend powering two A119S dashcams from that adapter. You can order a higher amp 4amp with 2amp per port adapter or hardwire the rear window dashcam to fuse box on ACC fuse.

 

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