Pinout configurations can vary slightly based on the exact OEM revision (e.g., Simplo vs. Dynapack). Always verify with a multimeter before connecting custom hardware.

– A redundant pin for the main power rail to handle higher current.

If your battery has , refer to the HP MU09 or MU04 pinout (which adds a secondary thermistor line). The MU06 is strictly 5-pin.

or chips. If the battery cells are deeply discharged (below ~3.0V), the BMS may enter a "Permanent Failure" (PF) state, which requires specialized software like the NLBA PC Software or a TI EV2300/2400 to reset.