Netgear Nighthawk M6 Pro Issues (Overhearting, Slow charging, battery runs out ..etc)

The device is slow or will not charge to 100%:

-Use the provided netgear cable and charger

-power of the device, remove the battery cover, run a small fan over the battery while you are charging it, it has to recharge while it is OFF.

Overheat:

-yes it gets hot, that is also something i do not like about these products. it is a compact device, but I also agree Netgear should create a better design to transfer all the heat, and should provide a better means of having that heat escape by means of conduction and convection. The device is made of plastic, a very poor conductor of heat. I guess it has to be plastic for the radio waves to penetrate better for the 5G radio, but i think certain areas should be metal to allow the heat to flow out of the 5G and wifi modems.
-in short, there is nothing much you can do here except use this device in a well ventilated area. when i use it in the car, i put it somewhere i can point the car's AC to cool it off. I use a mesh bag to carry it around, not a totally enclosed one. If you have to travel and put it in a suitcase, sadly, i suggest you turn it off.
-no it will not explode, nor will it catch fire because netgear has built in firmware protection mechanisms to shutoff the 5G radio and also charging, when the device is hot. that's why it takes forever to charge it once it gets hot.

-tip: Do not let it get hot. always connect it to the charger when you can. because once the temperature warning is displayed, it will take a long time before the device cools. then you will need to open it and let the heat escape. I agree netgear needs to do some work on the design.