EB-BG973ABU Samsung Galaxy S10 Replacement Battery 3.85V 3300mAh

Samsung Galaxy S10 — 3.85V Li-Polymer Replacement Battery (EB-BG973ABU)

This is a 3300mAh, 3.85V lithium-polymer cell for the Samsung Galaxy S10 (SM-G973 series, including SM-G9730/DS and SM-G9738/DS). It replaces OEM part EB-BG973ABU and GH82-18826A. The battery restores full power to the display, processor, modem, and all onboard functions.

• SM-G973 series compatibility: All SM-G973 variants share the same 3.85V power rail, connector pinout, and BMS handshake protocol. The cell dimensions — 82.40 × 43.53 × 5.10mm — match the original chassis footprint exactly, so no mechanical modifications are needed during installation.
• Bench tested on actual hardware: We ran this cell on an SM-G973F through a full charge-discharge cycle. The BMS accepted charge at both standard and fast-charge rates. Voltage at rest settled at 3.85V. Coulomb counter communication with the OS came up clean with no fault flags on the first cycle.
• First-cycle fuel gauge recalibration: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC build an accurate discharge curve against the new cell before high-current charging pushes current into an uncalibrated state. One full slow cycle prevents erratic percentage readings early on.

Sudden shutdown at 20–30% on the replacement cell

This is the most reported issue after a cell swap on the S10. The fuel gauge IC is still using the discharge curve it mapped to the old, degraded cell. When the new cell hits a voltage point that the IC associates with a low-battery cliff, it signals a shutdown even though usable charge remains. Under modem or screen load, the voltage sag on a fresh cell can look different from what the gauge expects. One complete slow discharge to below 5% followed by a full charge to 100% re-anchors the coulomb counter to the new cell's actual curve.

USB-PD fast charge not activating on the first cycle after installation

After a cell replacement, the S10's charge IC sometimes does not negotiate the fast-charge handshake on the very first plug-in. This happens because the BMS on the new cell starts in a conservative current-limited state until it completes one full cycle and confirms thermal and voltage parameters are stable. Plug in using a standard 5V charger for the first full charge rather than a fast-charge adapter. After that first cycle completes, fast charging negotiation re-enables normally and the device will accept the higher current rate.