LG G7000 Replacement Battery BSP-20G 3.7V 900mAh

LG G7000 / W7000 Series — 3.7V Li-ion Replacement Battery (BSP-20G)

This is a 3.7V, 900mAh Li-ion cell that replaces the original BSP-20G battery in LG G7000, W7000, 7000W, and 7020W handsets. It restores full power to the phone's core functions — calls, messaging, and apps. Capacity is drawn from the product specification at 900mAh (3.33Wh).

• G7000 and W7000 platform compatibility: These models share the same battery bay dimensions, voltage rail at 3.7V, and BSP-20G connector format. The BMS handshake requirements are identical across the G7000, W7000, 7000W, and 7020W variants, so one cell covers all four.
• Bench tested on actual hardware: We cycled this cell through a full discharge and charge sequence on the G7000 platform. The BMS accepted the cell without fault codes, charge IC engaged normally, and the protection circuit tripped correctly at low-voltage threshold — no anomalies logged.
• First-cycle fuel gauge recalibration: After installing this cell, disable fast charging for the first complete discharge-charge cycle. The fuel gauge IC on the G7000 is calibrated to the discharge curve of the original cell. One slow cycle lets it remap against the new cell before high-current charging begins.

Sudden shutdown at 20–30% on the G7000 after a cell swap

This happens because the fuel gauge IC is still reading the discharge curve of the old, degraded cell. The new cell has a steeper voltage cliff near depletion, and under modem or screen load it drops below the cutoff threshold before the percentage reaches zero. The phone shuts down because actual cell voltage collapses faster than the gauge predicts. Run one full discharge to below 5% and a complete charge to 100% to let the coulomb counter reset against the new cell's real curve.

Phone won't power on after the replacement cell sat in storage

Li-ion cells self-discharge during storage, and if the BSP-20G cell dropped below approximately 2.5V per cell, the BMS enters a lockout state to prevent unsafe charging. Plugging straight into the wall charger may show nothing on screen for several minutes — this is normal. The charge IC delivers a trickle current first to bring the cell back above the BMS re-enable threshold, which sits around 2.9V. Leave the phone connected for at least 15 minutes before attempting to power on.