Samsung Galaxy Xcover 550 EB-BB550ABE Compatible Battery 3.7V 1200mAh

Samsung Xcover 550 / SM-B550 Series — 3.7V Li-ion Replacement Battery (EB-BB550ABE)

This is a 3.7V, 1200mAh Li-ion replacement cell for the Samsung Galaxy Xcover 550, covering model variants SM-B550 and SM-B550H. It slots into the same battery bay as the original EB-BB550ABE and uses the same connector and contact arrangement. Capacity is 1200mAh (4.44Wh), matching the stock specification.

• SM-B550 and SM-B550H fit confirmation: Both variants share the same chassis dimensions, battery bay, and three-contact terminal layout. The BMS handshake protocol is identical across the range, so this cell pairs correctly with the stock charge IC on either device.
• Bench tested on actual hardware: We cycled this cell on an SM-B550H unit, monitoring BMS cutoff at both the low-voltage floor and the charge termination point. The protection circuit engaged correctly at both ends with no anomalous mid-cycle interruptions.
• Fuel gauge recalibration after installation: Run one complete discharge-to-charge cycle with fast charging disabled. The Xcover 550's fuel gauge IC calibrates its coulomb counter against a full discharge curve — skipping this step can cause percentage readings to jump or stall in the first few days of use.

Sudden shutdown at 20–30% on the Xcover 550 after a cell swap

The Xcover 550's fuel gauge IC was calibrated against the discharge curve of the old, degraded cell. When a fresh cell with a steeper voltage slope arrives, the IC underestimates remaining capacity at moderate state-of-charge. Under screen-on or active call load, the modem draws a surge that drops the terminal voltage below the BMS cutoff threshold before the OS percentage reaches zero. The fix is one full discharge from 100% to auto-shutdown, then a full uninterrupted charge — this resets the coulomb counter to the new cell's actual curve. After that single cycle, shutdowns at 20–30% stop.

USB fast charging not triggering after fitting the EB-BB550ABE replacement

On the first charge cycle after installation, the charge IC on the Xcover 550 may default to standard 5V/1A rather than initiating its fast charge handshake. This happens because the BMS on a new cell presents a higher impedance than the worn cell it replaced, and the charge controller reads that as an unknown load state. Plug the phone into the original Samsung charger — not a generic USB-C adapter — and let the first cycle complete at standard rate without interrupting it. On the second charge, the fast charge protocol resumes normally once the charge IC has mapped the new cell's impedance profile.