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When looking directly at the battery connector with the locking tabs facing upward and counting from , the pins map out to specific electrical functions. Pin Number Signal Name Description Pin 1 (+) Plus / VCC Main positive power output / charging input Pin 2 (+) Plus / VCC Parallel secondary positive link (redundancy) Pin 3 SCL (Clock) I2C / SMBus Clock line for data transmission Pin 4 SDA (Data) I2C / SMBus Data line for status communication Pin 5 SYS / CID System Present / Battery Insertion Detection pin Pin 6 (-) Minus / GND Main system ground / negative terminal Pin 7 (-) Minus / GND Parallel secondary system ground (redundancy) Detailed Pin Function Breakdown 1. The Power Terminals (Pins 1, 2, 6, and 7)
| Pin Number | Function | Description & Notes | | :--------- | :--------------------------- | :-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | 1 | | Main battery negative terminal; connects directly to the laptop's ground. | | 2 | Battery Negative (B-) | Often multiple pins are used for the main power path to handle higher current loads safely and provide redundancy. | | 3 | System Management Bus Clock (SMBCLK) | This pin carries the clock signal for the SMBus, synchronizing data transmission between the battery and the laptop. | | 4 | System Management Bus Data (SMBDAT) | This pin carries the actual data, such as voltage, current, temperature, and remaining capacity. | | 5 | Battery Presence | This pin is used by the laptop to detect if a battery is physically installed. It is often pulled to ground within the battery pack. | | 6 | Temperature (Thermistor) | Connected to a negative temperature coefficient (NTC) thermistor within the battery pack. Its resistance decreases as temperature rises, allowing the laptop to monitor battery temperature and prevent overheating. Often 10kOhm at 25°C. | | 7 | Battery Positive (B+) | Main battery positive terminal. | | 8 | Battery Positive (B+) | Multiple pins for the main power path. | | 9 | Cell Tap (Optional) | In some smart batteries, an extra pin connects to the junction between two cells to allow the battery management system (BMS) to monitor the midpoint voltage of the series cell string for cell balancing. |
The space between the female pins on the MU06 is highly constricted. Using thick multimeter probes can easily bridge Pin 6/7 to Pin 5 or Ground, instantly destroying the internal BMS logic board or causing a thermal event. Use fine-tipped sewing needles or specialized back-probes.
For further study, download the datasheet of the – it is the most common fuel gauge inside HP MU06 batteries and will give you full register mapping and pinout of the internal PCB. Hp Mu06 Notebook Battery Pinout Configuration
: Look for the small plastic notches on the connector. On some HP models, Pin #1 is indicated on the motherboard next to the socket. Key Technical Specs Voltage : 10.8V or 11.1V (compatible). Capacity : Typically 47Wh to 52Wh (4400mAh – 5200mAh)
While physical layouts can vary slightly by OEM manufacturer (Simplo, Dynapack, or Celxpert), the logical pinout follows a standard Smart Battery Data Specification (SBDS).
System Present / ID (Sometimes needs to be pulled to ground to enable output) Pin 5: Clock (SCL) (SMBus/I2C communication) Pin 6: Data (SDA) (SMBus/I2C communication) Pin 7: Positive (V+ / +) (Output voltage) Pin 8: Positive (V+ / +) (Output voltage) When looking directly at the battery connector with
| Measurement Points | Expected Voltage (Standalone) | Expected Voltage (In Laptop, AC Present) | |----------------------|-------------------------------|-------------------------------------------| | Pin 6 to Pin 1 | 0V (FETs open) or 10.8–12.6V (rare if not locked) | 11–13V (charging) / 9–12V (discharging) | | Pin 3 (SMBC) to GND | 0V (no pull-up) | 3.3V | | Pin 4 (SMBD) to GND | 0V | 3.3V fluctuating (data activity) | | Pin 5 (TH) to GND | 10 kΩ to 100 kΩ (resistance) | 0.5V–2.5V (depending on temperature) |
If you want to move forward with a project involving this battery, tell me:
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. | | 2 | Battery Negative (B-) |
Pin 5 is a crucial safety feature called or Battery Insertion (BI) . Inside the battery pack, this pin is usually pulled down to Ground via a low-value resistor (typically around 10kΩ) or connected to a thermal switch.
The pins inside the MU06 connector slot are very close together. When inserting jumper wires or multimeter probes, ensure they do not touch adjacent pins simultaneously. Shorting Pin 1 to Pin 3 or Pin 4 can permanently fry the internal SMBus chip.
The MU06 battery typically utilizes an . While official HP documentation rarely provides pinouts for consumer-level repair, community data and electrical testing define the standard 8-pin layout as follows: Pin 1: Ground (Negative / -) Pin 2: Ground (Negative / -) (Doubled for current handling) Pin 3: Unknown / NC (Often no connection)
