Doro Liberto 810 Replacement Battery DBH-1500A 3.7V 1500mAh

Doro Liberto 810 Series — 3.7V Li-ion Replacement Battery (DBH-1500A)

This is a 3.7V 1500mAh Li-ion replacement cell for the Doro Liberto 810, Liberto 810 Mini, and model 6379. It matches the OEM DBH-1500A specification and fits the original battery bay without modification. Capacity is 1500mAh (5.55Wh), identical to the factory cell.

• Liberto 810, 810 Mini, and 6379 compatibility: All three models share the same battery bay dimensions, connector pinout, and BMS handshake protocol — one cell covers the entire range without adaptation.
• Bench tested on actual hardware: We ran this cell through a full charge-discharge cycle on the Liberto 810. The BMS accepted the cell without error flags, and charge IC communication stayed within normal parameters throughout.
• Fuel gauge recalibration after install: After fitting this cell, run one complete discharge to automatic shutdown, then charge uninterrupted to 100% before use. The Liberto 810's fuel gauge IC calibrates its coulomb counter against this first full cycle — skipping it causes the OS to report inaccurate percentages for days.

Why the Liberto 810 reports wrong battery percentage after a cell swap

The Liberto 810 uses a fuel gauge IC that builds its charge model from the original cell's discharge curve. When you install a new cell, that learned curve no longer matches the actual cell chemistry. The IC keeps projecting percentage against old data, so the displayed number drifts from reality. One complete discharge-to-shutdown followed by an uninterrupted charge to 100% resets the coulomb counter and forces the IC to relearn against the new cell.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops sharply under load — typically during a voice call, when the modem draws a burst of current the cell can't sustain cleanly. The phone's protection circuit reads the resulting voltage sag as critically low and cuts power before the displayed percentage reaches zero. It is not a faulty cell — it is an uncalibrated fuel gauge mapping the wrong voltage cliff. Complete the recalibration cycle described above; after one full discharge-charge cycle the shutdown threshold should align correctly with actual cell voltage near 3.5V under load.