Gigaset GS370 V30145-K1310-X465 Compatible Battery 3.85V 2850mAh

Gigaset GS370 — 3.85V Li-Polymer Replacement Battery (V30145-K1310-X465)

This is a 3.85V, 2850mAh Li-Polymer cell for the Gigaset GS370 smartphone. It replaces the original V30145-K1310-X465 battery when the factory cell can no longer hold an adequate charge. Dimensions are 72.30 × 61.86 × 3.78mm — confirm these against your existing cell before installing.

• GS370 fitment: The GS370 uses a BMS that monitors cell voltage and communicates charge state to the Android fuel gauge IC. This cell matches the required voltage rail and connector pinout so the BMS handshake completes without error flags.
• Bench tested on actual hardware: We cycled this cell through charge and discharge while monitoring BMS cutoff behaviour at the low-voltage threshold. The protection circuit tripped correctly at the expected floor voltage, and the charge IC accepted a standard CV/CC profile without faults.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one full discharge-to-charge cycle. This gives the fuel gauge IC a complete dataset against the new cell's actual discharge curve before fast-charge current is applied to an uncalibrated cell.

Sudden shutdown at 20–30% on the GS370 after a cell swap

The GS370's fuel gauge IC holds a charge curve from the old, degraded cell in its coulomb counter. A new cell has a steeper voltage drop under modem and screen load than the IC expects at that state of charge. When actual cell voltage falls below the hardware cutoff threshold — even while the OS still shows 20–30% — the phone shuts down immediately. One full discharge cycle forces the coulomb counter to relearn the new cell's voltage-capacity relationship and moves the shutdown point back to where it belongs.

GS370 not powering on after the replacement cell sat in storage

Li-Polymer cells self-discharge in storage. If the cell voltage has dropped below approximately 2.5V, the BMS enters a lockout state and blocks normal charge current as a safety measure. The GS370 will show no response — no boot screen, no charging indicator. Connect the phone to a wall charger rather than a PC port; a wall adapter delivers enough trickle current to nudge the cell above the BMS re-initialisation threshold, after which normal charging resumes. If the phone still shows no sign of life after 30 minutes on the wall charger, check that the charger output is at least 5V 1A.