V30145-K1310-X470 Gigaset GL390 Replacement Battery 3.7V 800mAh

Gigaset GL390 / GL590 — 3.7V Li-ion Replacement Battery (V30145-K1310-X470)

This 3.7V 800mAh Li-ion battery replaces the original cell in the Gigaset GL390 and GL590 mobile phones. It matches the OEM part number V30145-K1310-X470 and fits the factory battery slot without modification. Voltage and capacity figures come directly from the product data — 3.7V nominal, 2.96Wh.

• GL390 and GL590 shared platform: Both models run the same battery bay dimensions (53.00 × 34.00 × 4.80mm), the same 3.7V voltage rail, and the same connector pinout. One cell covers both handsets without any adapter or wiring change.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on a GL590 unit. The BMS accepted the charge handshake on the first connection, held cutoff correctly at low voltage, and did not trigger any overcharge fault flags during the test sequence.
• Fuel gauge recalibration on first cycle: After fitting this cell, disable fast charging if your charger supports it and run one complete discharge down to automatic shutdown, then charge to 100% uninterrupted. This gives the GL390's fuel gauge IC one clean reference cycle against the new cell's discharge curve before it locks in percentage reporting.

Why the GL390 reports wrong battery percentage after a cell swap

The GL390 uses a fuel gauge IC that builds its percentage model from accumulated charge and discharge history. When you fit a new cell, the IC still holds calibration data from the old, degraded cell. It maps the new cell's voltage curve against the wrong reference, so the percentage shown on screen does not reflect actual charge state. One full discharge-to-shutdown followed by a complete uninterrupted charge resets the coulomb counter and re-anchors the gauge to the new cell.

Sudden shutdown at 20–30% on the replacement cell

This happens when the fuel gauge IC has not yet recalibrated and the phone hits a voltage cliff under screen or modem load. The cell voltage drops sharply under current draw even though the reported percentage looks safe, and the protection circuit trips before the OS can respond. It is not a fault in the replacement cell — it is a calibration lag. Run one full supervised discharge cycle and the shutdowns will stop once the gauge IC locks onto the correct low-voltage threshold, typically around 3.0–3.2V under load.