About this replacement
Samsung Galaxy Fold 5G — 3.85V Li-Polymer Replacement Battery (EB-BF907ABA)
This is a 3.85V, 2000mAh Li-Polymer replacement battery for the Samsung Galaxy Fold 5G, covering SM-F907N and SM-F907B variants. It carries OEM part number EB-BF907ABA and matches the original cell's dimensions at 62.50 x 42.40 x 4.70mm. This battery sits in the outer display assembly of the foldable chassis — the smaller of the two cells in the Fold's dual-battery configuration.
- SM-F907N and SM-F907B fitment: Both variants share the same outer battery bay geometry, connector pinout, and BMS handshake protocol — which is why a single cell covers both regional SKUs. The inner battery (EB-BF900ABU) is a separate unit and is not covered by this listing.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the SM-F907 platform. The BMS accepted the cell without triggering thermal cutoff, and charge IC handshake completed normally at both 5W and 15W input levels.
- Fuel gauge recalibration after installation: On first use after fitting this cell, disable fast charging and run one complete discharge-to-charge cycle. The fuel gauge IC was calibrated to the old cell's discharge curve — one full cycle lets it remap against the new cell before fast charging pushes high current into an uncalibrated state.
Sudden shutdown at 20–30% on the Galaxy Fold 5G outer battery
The outer battery in the Fold 5G powers the cover display and shares load with the modem during calls and data bursts. A degraded or freshly fitted cell can hit a voltage cliff — where cell voltage drops sharply under load before the state-of-charge reading catches up. The fuel gauge IC still reports 20–30% remaining, but the cell cannot sustain the voltage rail under peak draw, and the device shuts down as a protection response. One full discharge-charge cycle after installation lets the coulomb counter recalibrate and shifts the shutdown threshold to match actual cell capacity.
USB-PD fast charge not recognised on first cycle after cell swap
After replacing the EB-BF907ABA cell, some users find fast charging falls back to standard 5W on the first charge session. This happens because Samsung's Adaptive Fast Charging handshake requires the charge IC to confirm cell impedance is within expected range before stepping up current — on a brand-new cell, impedance reads higher than a conditioned cell, and the IC defaults to conservative charge rate. Run one full standard-rate charge cycle first. By the second session, impedance normalises and fast charge resumes; the phone should confirm this with a "Fast charging" status message when plugged in.