Samsung Galaxy S9 EB-BG960ABE Replacement Battery 3.85V 3000mAh

Samsung Galaxy S9 — 3.85V Li-Polymer Replacement Battery (EB-BG960ABE)

This is a 3000mAh, 3.85V lithium-polymer replacement battery for the Samsung Galaxy S9 and Galaxy S9 Duos (SM-G960, SM-G960F/DS). It replaces OEM part EB-BG960ABE and restores power capacity to devices where the original cell has degraded through repeated charge cycles. Fits the SM-G960 series including all regional variants listed under that model line.

• SM-G960 series compatibility: All SM-G960 variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol — the fuel gauge IC communicates over the same single-wire bus across the full S9 lineup, so one cell covers the range.
• Bench tested on actual hardware: We ran this cell on an SM-G960F board and confirmed the BMS initialised correctly on first insertion — charge IC accepted the cell without a handshake fault, and the fuel gauge IC began its coulomb-counting sequence from the first power-on.
• Fuel gauge recalibration on first use: Disable fast charging for the first complete discharge-charge cycle after installation. The fuel gauge IC in the S9 recalibrates its discharge curve against the new cell during this cycle — skipping it with a high-current fast charge session leaves the coulomb counter tracking the wrong curve from the start.

Why the Galaxy S9 reports wrong battery percentage after a cell swap

The S9 uses a coulomb-counter fuel gauge IC that stores a learned discharge curve from the original cell. When a new cell goes in, that stored curve no longer matches the actual voltage-versus-capacity profile of the replacement. The gauge reads voltage correctly but maps it to the wrong state-of-charge point, so the displayed percentage drifts. One full uninterrupted discharge down to automatic shutdown — followed by a full charge to 100% — forces the IC to relearn the curve against the new cell.

Sudden shutdown at 20–30% charge remaining

This is a voltage-cliff failure — under heavy load from the modem, screen, or both simultaneously, the cell voltage drops sharply before the fuel gauge reaches 0%. The S9's power IC triggers an emergency cutoff when cell voltage falls below roughly 3.4V under load, even if the displayed percentage looks safe. A degraded or uncalibrated cell hits that voltage floor much earlier in its discharge curve than the gauge expects. After the fuel gauge recalibration cycle described above, test under a full-screen brightness video stream — if shutdown still occurs above 15%, the cell voltage under load is the issue to recheck.