Sorry to hear that, but lesson learned. I reserve the micro-usb for firmware updates and only charging in an emergency. Some boards have a more securely mounted port than others.In order to confirm the need for an external charger, I should tell you that the micro USB port of my mod came out. I glued it, and then I needed to clean the port with Acetone. This is how it looks:
View attachment 749887
If you are going to use the port frequently, it's a good idea to get a magnetic connector for it. You plug in the adapter to the mod and leave it plugged in all the time. Then you have a magnetic attachment that provides charging and data. If the cable gets yanked too hard, it simply disconnects.
Charging via the port isn't consistent across all boards. Some do a better/safer job than others, some can do balanced charging on duel battery mods well, some can't. It's best just to have it for emergency use if needed.
Good luck