Never attempt to charge an MU06 battery by applying raw 12V directly to Pin 7 and Pin 1 without a dedicated CC/CV (Constant Current/Constant Voltage) charging controller. Lithium cells require precise multi-stage charging algorithms monitored via the SMBus data lines to prevent overcharging.
HP uses dual pins for the ground connection. This splits the current load during high-drain operations or rapid charging, preventing localized overheating of the connector contacts.
Most MU06 batteries contain a "Smart Battery" circuit. If the voltage drops below a certain threshold (usually 2.5V per cell), the internal MOSFETs will permanently "brick" the battery for safety.
The SMBus requires pull-up resistors on both the clock and data lines, typically supplied by the laptop’s EC (Embedded Controller). The communication occurs at a standard SMBus frequency of 100 kHz, and addresses are 7 bits wide. SMBus devices are required to acknowledge their own address, providing a mechanism for the host controller to detect the presence of a battery.
The internal BMS has tripped a permanent failure flag (UVLO - Under-Voltage Lockout) due to dead cells or a short circuit. The pack is dead and unsafe to use. Safety Guidelines and Warning Hp Mu06 Notebook Battery Pinout Configuration
If you are attempting to charge or discharge the MU06 battery outside of a laptop using a benchtop power supply or an active load tester, follow these strict rules:
Connect a jumper wire between Pin 5 (SYS_PRES) and Pin 6/7 (GND). This triggers the internal MOSFETs to open the voltage output on Pins 1 and 2.
The HP MU06 battery has been a widely-used power source for numerous HP notebook models produced between 2010 and 2013. These lithium-ion power packs feature a distinctive 8-pin connector that integrates power delivery with sophisticated data communication, allowing the laptop to monitor battery health, charge levels, temperature, and safety status in real time. Understanding the pinout configuration of this battery is essential for technicians performing diagnostics, for hobbyists working with battery management systems, and for anyone troubleshooting charging issues on compatible HP laptops.
Before analyzing the pinout, it is essential to understand what is inside the plastic casing. Standard MU06 batteries rely on a (3 cells in series, 2 in parallel). Chemistry: Lithium-Ion (Li-ion) Never attempt to charge an MU06 battery by
How to Identify Your Laptop and Battery Number - Micro Center
10.8V or 11.1V (depending on whether the individual cells are rated at 3.6V or 3.7V). Fully Charged Voltage: ~12.6V Capacity: Typically 4400 mAh to 5200 mAh.
. A communication line for the laptop to read battery health and status data. Pin 4: SMbus Data (D / SDA) . The data line for the SMBus interface. Pin 5: Temperature (T / Thermistor)
The HP MU06 is one of the most widely used laptop batteries in hardware history, powering multiple generations of HP Pavilion, Envy, G-series, and Compaq Presario laptops. For hardware hackers, electronics hobbyists, and repair technicians, understanding the pinout configuration of this battery is essential for external charging, capacity testing, or repurposing the lithium-ion cells safely. This splits the current load during high-drain operations
Negative terminals, often bridged for higher current capacity. SMBus Clock (SCL) Communication line for the battery management system (BMS). Pin 4 SMBus Data (SDA)
Before looking at the specific pins, it helps to understand the internal architecture of the pack. Lithium-ion (Li-ion)
Fits HSTNN-178C, HSTNN-C51C, HSTNN-Q60C, 593553-001, and dozens of other HP part numbers. Safety and Warning Notes
Sometimes used as a "detect" pin; often must be pulled to GND for the battery to output power. V+ (Positive) Main power output (typically 10.8V or 11.1V). Guide to Identifying Pinout Manually
SMBus Data line for battery telemetry (charge %, cycles, etc.). Thermistor (T) Temperature sensing (NTC) to prevent overheating. 6 & 7 System Present