Samsung Galaxy S10 Lite EB-BA907ABY Replacement Battery 3.85V 4400mAh

Samsung Galaxy S10 Lite / SM-G770 — 3.85V Li-Polymer Replacement Battery (EB-BA907ABY)

This 3.85V, 4400mAh Li-Polymer cell replaces the original battery in the Samsung Galaxy S10 Lite. It fits the SM-G770, SM-G770F, and SM-G770F/DS variants. The OEM part number EB-BA907ABY and GH82-21673A both reference this same cell specification.

• SM-G770 variant coverage: The SM-G770 series shares a single battery bay format, connector pinout, and BMS handshake protocol across all regional variants. One cell covers the full lineup without modification.
• Bench tested on actual hardware: We ran this cell through charge initiation and BMS handshake verification on SM-G770F hardware. The charge IC accepted the cell without fault flags, and the BMS reported state-of-charge correctly within the first cycle.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one full discharge-to-charge cycle. The fuel gauge IC on the S10 Lite calibrates its coulomb counter against the new cell's discharge curve — skipping this step with fast charging active can push current into an uncalibrated cell and produce inaccurate percentage readings for weeks.

Sudden shutdown at 20–30% on the S10 Lite after a cell swap

This is a voltage cliff issue, not a capacity problem. When the modem fires a high-power burst or the AMOLED panel peaks, the cell must sustain voltage above 3.4V under load. An aged or freshly installed cell with an uncalibrated fuel gauge hits the hardware undervoltage cutoff before the OS percentage reaches zero. The phone shuts down not because the battery is empty, but because the BMS triggered at the real voltage floor. One full discharge cycle lets the coulomb counter map the actual knee of the discharge curve and shifts the shutdown point to where it belongs.

USB-PD fast charge not working on the first cycle after replacement

The S10 Lite's charge IC negotiates the fast charge protocol only after it confirms the cell is within a safe state-of-charge window. On a freshly installed cell, the fuel gauge IC has no prior cycle data, so the charge controller defaults to standard 5V input as a precaution. This is normal behaviour, not a fault with the replacement cell or the charger. Complete one full standard-rate charge cycle first — fast charging resumes automatically once the fuel gauge IC logs a complete charge-discharge reference point.