The SMBus protocol (Pins 2 & 3) is key to smart battery operation. Using tools like an , a Bus Pirate , or an i2c/SMBus adapter (e.g., CP2112) , you can read battery registers.
The HP MU06 is with HP MU09, MU03, or MU06 variants from different series (e.g., HP Omen uses different pin mapping). Always verify pinout before connecting: Hp Mu06 Notebook Battery Pinout Configuration
Are you trying to using an Arduino or Raspberry Pi? The SMBus protocol (Pins 2 & 3) is