LG G7200 Replacement Battery 3.7V 900mAh Li-ion

LG G7200 — 3.7V Li-ion Replacement Battery

This is a 3.7V Li-ion battery rated at 900mAh (3.33Wh) for the LG G7200 mobile phone. It slots into the G7200's battery bay and restores power to calls, messaging, and core phone functions. Use this when the original cell no longer holds enough charge to carry the phone through a normal day.

• G7200 fitment: The G7200 uses a removable 3.7V single-cell Li-ion pack with a specific contact arrangement on the battery door side. This replacement matches that contact layout and the battery bay dimensions, so the door closes flush and the contacts seat correctly.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench. The BMS held cutoff at the correct thresholds — it accepted charge current cleanly and terminated at full voltage without tripping a fault state.
• Fuel gauge recalibration after install: On first use after swapping this cell in, disable fast charging if your charger supports it, then run one complete discharge-to-charge cycle. This lets the G7200's fuel gauge IC map its percentage readings against the new cell's actual discharge curve before high-current charging begins.

Sudden shutdown at 20–30% on the LG G7200 after a cell swap

This is a voltage cliff issue, not a capacity defect. When the modem fires up for a call or the screen runs at full brightness, the current draw spikes. If the fuel gauge IC is still calibrated to the old cell's discharge curve, it miscalculates the remaining voltage headroom. The phone's protection circuit sees the actual cell voltage drop below the safe floor and shuts down — even though the OS was showing 25% a second earlier. One full discharge-to-charge cycle with fast charging off resets the coulomb counter against the new cell's real characteristics.

LG G7200 showing wrong battery percentage after replacement

The fuel gauge IC on the G7200 stores a learned discharge model from the original cell. Drop in a new cell and that model is immediately out of sync — the IC is calculating percentage against a capacity curve that no longer applies. You'll see the percentage jump erratically, plateau for long stretches, or read 100% well before the cell is fully charged. Drain the battery until the phone shuts off on its own, then charge uninterrupted to full — one complete cycle forces the IC to rebuild its model against the new cell. After that cycle, percentage readings stabilise.