I replaced my original charger for this one http://a.co/c2pWbQs
My original charger for the Hi13 stopped working in the first 2 weeks. Couldn’t get in touch with the seller because of Chinese holiday so I took a shot and bought this one from Amazon rather than wait a month or more. It has many output frequencies including 12v 2a. Works great, maybe even better than the original. I wasn’t timing it but I quite sure it charged faster. I will need to test further. So happy. I thought the tablet was dead.
I don’t see why a powerbank that outputs 12v 2a wouldn’t work. The type-c cable you use could be a factor too. I know my Galaxy Note 8 will not charge properly with another type-c cable I have that’s actually thicker than the original. I thought it would work better because of that. Silly me.