When you buy a PD charger from amazon, for the best compatibility, look if it says in the title or description the New Macbook or Macbook Pro. If in the description or the title are only phones and tablets (like LG, Nexus, iPhone, iPad, Samsung Galaxy), the while it supports USB Power Delivery, it does only charge at 5V at most. Which will damage the tablet, as the Core M requires a 9V-12V battery. Those chargers that have green USB ports are almost certainly not compatible, as they are Qualcomm Quickcharge ports. Likewise if there are more than 3 usb ports on the charger with low Wattage. This charger for example works fine with the Cube i7 Book: https://goo.gl/aUmMd2 Meanwhile these just damage it if not in the short, then in the long run: https://goo.gl/AKK9d6 – this can output 9v-12v, but not in 1.5A. If you use the tablet plugged in, in the long run it will damage the charging circuitry and the battery. https://goo.gl/h20B04 – while this is a 30W charger, it charges at a maximum of 5V through USB PD (or 20V through Qualcomm QC, but this will not jelp us). It will definitely damage the tablet. Also bear in mind, that if you charge over USB, you NEED to use a cable with an 56k ohm Pull-up resisor. If you use a cheap alternative, the device could take more power through the charger than it can whistand, and it will fry. A google engineer tested a bunch of cables, but if you buy from amazon, most of them will have this in their title or description, like this: https://goo.gl/BisLLm As the charger and the cable is as important at this new standard as the quality of the PSU in PCs, do not buy cheap and unreputable brands.
Battery charging is unrelated to the cpu power requirements. The battery is a 7.4v one, by the way. Besides that, the usb-c charging circuitry might have been designed to convert to 12v (or the required voltage). Besides that, 12V is not a valid USB PD charging voltage for type C (5,9,15 or 20V).
I would stick to chargers and cables recommended by Nathan K. and Ben Leung: https://docs.google.com/spreadsheets/d/1vnpEXfo2HCGADdd9G2x9dMDWqENiY2kgBJUu29f_TX8/edit?usp=sharing
See that there’s not a single one that looks good enough for this tablet.
