About this replacement
Samsung Galaxy S23 FE — 3.88V Li-Polymer Replacement Battery (EB-BS711ABY)
This 3.88V, 4350mAh Li-Polymer battery replaces part number EB-BS711ABY in the Samsung Galaxy S23 FE and S23 FE 5G (SM-S711B, SM-S711W). It matches the original cell's voltage rail, physical footprint (74.30 × 65.60 × 4.90mm), and connector pin-out. Capacity figure is drawn from the product specification — 16.88Wh rated.
- SM-S711 series compatibility: The SM-S711B and SM-S711W share the same battery bay geometry, charge IC interface, and BMS handshake protocol. One cell SKU covers both variants because Samsung used an identical voltage rail and connector across the FE and FE 5G configurations.
- Bench tested on actual hardware: We ran this cell through the SM-S711B charge IC and confirmed the BMS handshake completed without fault codes. The protection circuit responded correctly to overcurrent and over-temperature thresholds during load testing.
- First-cycle fast charge protocol: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate its coulomb counter against the new cell's discharge curve before the charge IC pushes high current into an uncalibrated cell.
Why the S23 FE reports wrong battery percentage after a cell swap
The Galaxy S23 FE uses a coulomb-counting fuel gauge IC that stores learned discharge curves from the old cell in non-volatile memory. When you install a new cell, the IC maps incoming voltage readings against the old curve, producing skewed percentage outputs. The fix is one full discharge-charge cycle with fast charging off, which forces the IC to rewrite its reference curve against the new cell's actual voltage-to-capacity relationship. After that single cycle, percentage readout stabilises.
Sudden shutdown at 20–30% on the replacement cell
This happens when the modem or display pulls a current spike the fuel gauge IC does not anticipate, causing cell voltage to sag below the BMS cutoff threshold even though the displayed percentage still reads 20–30%. The old fuel gauge calibration underestimates how steeply the new cell's voltage drops under load at lower states of charge. Run one full discharge down to automatic shutdown, then charge to 100% without interruption. After calibration, the BMS cutoff and the displayed percentage align closer to actual cell voltage — target 3.5V at shutdown as a confirmation check.