LG VX7000 Replacement Battery SBPL0073001 3.7V 1000mAh

LG VX7000 — 3.7V Li-ion Replacement Battery (SBPL0073001)

This is a 3.7V, 1000mAh Li-ion cell that fits the LG VX7000 and VX-7000 handsets. It replaces OEM part numbers SBPL0073001 and SBPL0073101. The original cells on these mid-2000s phones degrade quickly once cycle count climbs past a few hundred, leaving the phone shutting off unpredictably or barely holding a charge through a short call.

• VX7000 and VX-7000 fit: Both model designations use the same battery bay, connector pinout, and BMS handshake. One cell covers either variant — no modification needed.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a VX7000 unit. The BMS accepted the cell without fault codes, charge termination triggered correctly at 4.2V, and voltage under call-load held above the modem cutoff threshold.
• Fuel gauge recalibration after install: On first use, let the phone discharge fully to auto-shutdown, then charge uninterrupted to 100% before using it again. The VX7000's fuel gauge IC was calibrated to the original cell's discharge curve — one full cycle resets the coulomb counter against the new cell.

Why the VX7000 reports wrong battery percentage after a cell swap

The VX7000 uses a fuel gauge IC that tracks capacity by counting charge in and out against a stored discharge curve. When you swap in a fresh cell, that stored curve no longer matches the new cell's actual voltage profile. The gauge reads the voltage and maps it to the wrong percentage — often showing 80% when the cell is near depletion. One complete discharge-to-shutdown followed by a full uninterrupted charge resets the reference and brings the percentage display back in line.

Sudden shutdown at 20–30% on the replacement cell

This happens when the fuel gauge IC is still running on the old cell's curve and the new cell hits its actual voltage floor before the displayed percentage reaches zero. The modem radio draws a short burst of high current during a call or data transfer, the cell voltage dips below the BMS cutoff threshold, and the phone shuts off instantly. It is not a faulty cell — it is a calibration mismatch. Run one full discharge-charge cycle and the shutdowns stop. If shutdown persists after calibration, check that resting cell voltage is at or above 3.6V before reinstalling.