About this replacement
Samsung GT-I8260 / GT-I8262 Galaxy Core — 3.8V Li-ion Replacement Battery (B150AE)
This is a 3.8V, 1800mAh Li-ion replacement battery for the Samsung Galaxy Core and Galaxy Core Duos series, including the GT-I8260 and GT-I8262. It carries OEM part numbers B150AE, B150AC, B185BE, B185BC, and GH43-03849A. The cell slots directly into the existing battery bay and connects through the same three-contact BMS interface as the original.
- Galaxy Core and Core Duos compatibility: The GT-I8260 and GT-I8262 share the same battery bay geometry, contact pitch, and BMS handshake protocol. Both models read cell state through the same fuel gauge IC, so this battery communicates charge data correctly across both variants.
- Bench tested on actual hardware: We cycled this cell in a GT-I8262 and monitored BMS cutoff behaviour at both the low-voltage floor (2.5V per cell) and the charge termination point. The protection circuit triggers cleanly at both thresholds with no false cutoffs during normal screen-on load.
- Fuel gauge recalibration on first cycle: On first use after installation, disable fast charging for one complete discharge-charge cycle. This allows the fuel gauge IC to recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell — which causes percentage jumps and premature shutdowns.
Sudden shutdown at 20–30% on the Galaxy Core after a cell swap
This happens because the fuel gauge IC carries calibration data from the old, degraded cell. When a fresh cell is installed, the IC's internal charge map no longer matches the new cell's actual voltage curve. Under modem or screen load, the cell voltage dips below what the IC expects at that percentage, triggering an emergency shutdown. One full discharge down to the BMS floor followed by a full charge resets the coulomb counter and eliminates most of these premature cutoffs.
Phone reporting wrong battery percentage after installing the replacement cell
The Galaxy Core's fuel gauge IC uses a stored discharge curve built around the original cell's impedance profile. A new cell has lower internal resistance, so the voltage readings at any given state of charge are slightly higher than the IC expects — leading it to report inflated or erratic percentages. The fix is straightforward: run the phone down until it shuts off from low battery, then charge uninterrupted to 100% without unplugging early. After one complete cycle the IC recalculates its curve against the new cell and percentage reporting stabilises.