# AP9211 battery protection

I am planning on using a Diodes Inc. AP9211 battery protection circuit for an IoT project, and I have a question regarding usage.

The AP9211 will be embedded in the PCB, while the battery will be inserted afterwards. Once the battery is inserted, I do not expect to change it long-term. My schematic for the battery protection follows the datasheet guidelines, except I connect P- (the PACK- shown in the datasheet) to GND directly, as this is the GND of the whole circuit.

Since this IC is intented to be used in the battery pack and not separate, do you see any issues with connecting P- directly to GND? I would think not, because even if I placed the AP9211 on the battery pack, I would then connect P- to my circuit's GND through a cable or connector of some sort.

There is no problem initially connecting P- to BATT- as this IC needs to short those two terminals to begin operating if there is no charger connected. From Page 2 in the Notes:
Edit: You should connect BATT-, VSS and S1 to your circuit GND. It is my understanding that you can leave P-unconnected and floating if you do not use the charger side of the circuit and the protection side will still operate as per your use case but you should still check that yourself to confirm.