Lenovo ET960 Replacement Battery BP07 3.7V 1300mAh

Lenovo ET960 — 3.7V Li-Polymer Replacement Battery (BP07)

The BP07 is a 3.7V, 1300mAh lithium-polymer cell for the Lenovo ET960 smartphone. It replaces the original battery when the cell has degraded, lost capacity, or stopped holding a charge. Dimensions are 65.30 × 38.74 × 5.70mm — measure your bay before ordering if you are unsure.

• ET960 fitment: The BP07 part number is specific to the ET960 platform. The connector pinout and BMS handshake match the charge IC on this board — swapping in a generic cell with a mismatched BMS profile can cause the OS to misread state-of-charge from the first boot.
• Bench tested on actual hardware: We cycled this cell through full discharge and charge on the ET960 platform. The BMS accepted the cell without triggering a fault flag, and the fuel gauge IC began tracking voltage within the first cycle.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.

Sudden shutdown at 20–30% on the ET960 after a cell swap

A new lithium-polymer cell has a slightly different discharge curve than the original cell the fuel gauge IC was calibrated against. When the phone hits a voltage point the IC interprets as empty — even if the cell still has charge — the modem or display load causes a voltage dip below the shutdown threshold. The OS reads this as 0% and cuts power instantly. Running two full discharge-charge cycles at standard rate recalibrates the coulomb counter and eliminates most of these early shutdowns.

ET960 not powering on after the replacement battery sat in storage

Lithium-polymer cells self-discharge in storage. If the BP07 dropped below approximately 2.5V per cell before installation, the BMS enters a lockout state and the phone will not respond to a normal power button press. Connect the phone to a charger and leave it for 20–30 minutes without pressing anything — the charge IC trickle-charges the cell back above the BMS unlock threshold. Once the voltage recovers above 3.0V, the BMS releases and the phone will power on normally.