hi , I made that in laptop, for repair the dc jack, when was imposible repair pc board, or to attach in the inside, for the same reason. By the other, my teclast x98 pro, the current in charging is 2.2 amperes, is a lot of for a micro usb , and is easy to burn in summer. You need to weld to wire near micro usb,, pin of micro usb are very small, is dificult, remember for 2.2 amperes we ware with the diameter of wires, find in internet which one is the pin – and +, test with a volmeter for more security, made a hole in the back, tie the wires , and add dc jack in the outside. This is easy, we have a slow charger, 0.5 0.8 amperes no more. The reason is, teclast charger and other very good charger send by the two data pines a preconfigured voltage,difernent in the pins, and the tablet, phone, made a slow o fast charge, also check teclast, voltage, you have a power charger, but wire is thin, charger of my phone, the voltage is below 5 v, the current 1.1 amperes ande the wire is burn.
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