What's UNDER the hood? (LID) Nrf52840 BLE

Ever wonder what is underneath the LID of the chips we use?
I found this article and Pic to Shed some light on the subject, Simple things like Where is the IMU(not this one) on the thing? or is the Charge chip what gets warm, etc.

GL :slight_smile: PJ
thanks and credit to Josue Alejandro