About this replacement
Lenovo P700 / P700i — 3.7V Li-ion Replacement Battery (BL196)
This is a 3.7V 2500mAh Li-ion cell for the Lenovo P700 and P700i smartphones. It replaces OEM part number BL196 directly. Fit the battery when the original no longer holds a charge or the phone shuts down before the percentage hits zero.
- P700 and P700i compatibility: Both models use the same BL196 footprint, connector pinout, and BMS handshake protocol. The fuel gauge IC on the mainboard reads the same cell parameters across both variants, so one battery covers both.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on P700 hardware and confirmed the BMS accepted the cell without error flags. The charge IC ramped to full current and the fuel gauge tracked state-of-charge correctly after one complete cycle.
- First-cycle fuel gauge reset: On first use after installation, disable fast charging and run one full discharge-charge cycle before enabling high-current modes. This lets the coulomb counter recalibrate against the new cell's discharge curve before it starts calculating percentage from an old reference.
Sudden shutdown at 20–30% on the P700 after a cell swap
The P700's fuel gauge IC stores a learned discharge curve from the original cell. A new cell with a different internal resistance profile hits a voltage cliff at a different state-of-charge than the stored curve expects. Under modem or display load, the cell voltage drops below the shutdown threshold before the percentage reaches zero. One full discharge-charge cycle rewrites the reference curve and the shutdowns stop. If it persists beyond two cycles, check that the battery connector is fully seated — a loose pin causes intermittent voltage drops that trigger the same symptom.
Battery percentage jumping erratically after fitting the BL196
Erratic percentage readings come from the fuel gauge IC using a coulomb counter calibrated to the old, degraded cell. The new 2500mAh cell has a higher capacity and a different voltage-to-charge curve, so the IC misreads state-of-charge until it collects enough cycle data to update. Drain the battery down to the automatic shutdown point, then charge uninterrupted to 100% — this gives the IC a full reference sweep. After that single cycle, readings stabilise. Do not interrupt the charge during this calibration cycle.