SNN5828 Motorola V750 Replacement Battery 3.7V 950mAh

Motorola V750 — 3.7V Li-ion Replacement Battery (SNN5828)

This is a 3.7V, 950mAh Li-ion cell replacing OEM part SNN5828 in the Motorola V750 handset. It fits the V750 directly — same footprint at 59.80 × 35.63 × 4.50mm, same connector. Capacity matches the original specification from product data.

• V750 platform fit: The V750 uses a single-cell Li-ion pack at 3.7V nominal. The SNN5828 connector and contact layout are specific to this chassis — the replacement cell matches that layout so the phone's charge IC sees the correct pack geometry and does not flag an unrecognised battery.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a V750 unit. The BMS accepted the cell without rejection errors, the charge IC completed a full constant-current/constant-voltage cycle, and the fuel gauge did not lock out during testing.
• Fuel gauge recalibration on first install: After fitting this cell, run one full discharge down to automatic shutoff, then charge uninterrupted to 100% before use. The V750's fuel gauge IC was calibrated to the old cell's discharge curve — without one full cycle, it will misread state of charge against the new cell.

Why the V750 reports wrong battery percentage after a cell swap

The V750 uses a coulomb-counter-based fuel gauge that builds its state-of-charge model from accumulated charge and discharge data. When you swap the cell, the IC still holds the old cell's learned curve in memory. It will report percentages based on that stale model until it relearns against the new cell. One complete discharge-to-shutoff followed by a full uninterrupted charge resets the reference points. After that cycle, percentage readings track accurately against the 950mAh cell capacity.

Sudden shutdown at 20–30% on the replacement cell

This happens when the fuel gauge IC has not yet recalibrated and reports 25% while the actual cell voltage has already dropped to the cutoff threshold — typically 3.0V under load from the screen and radio combined. The phone shuts down not because the cell is faulty, but because the voltage collapses faster than the uncalibrated gauge predicted. Run the first full discharge cycle without interrupting it. Once the gauge recalibrates its endpoint to 3.0V, the reported percentage will align with actual remaining voltage and early shutdowns stop.