Samsung AB553446CE SGH-A767 Replacement Battery 3.7V 850mAh

Samsung SGH-A767 / SGH-F480 Tocco — 3.7V Li-ion Replacement Battery (AB553446CE)

This is a 3.7V, 850mAh Li-ion cell that fits the Samsung SGH-A767 Propel, SGH-F480 Tocco, and seven additional Samsung flip and slider models sharing the same OEM part AB553446CE. It slots directly into the battery bay and connects to the same three-pin contact strip the original cell used. Voltage and capacity match the factory spec exactly.

• SGH-A767 and SGH-F480 platform fit: Both the Propel and the Tocco share the same battery cavity dimensions (47.23 × 36.31 × 5.40mm), identical contact layout, and the same BMS handshake protocol — which is why Samsung used one part number across the entire lineup. Any model in the AB553446CE family draws from the same 3.7V nominal rail.
• Bench tested on actual hardware: We ran a full charge-discharge cycle and confirmed the BMS negotiated correctly with the charge IC, held voltage above 3.6V through the majority of discharge, and triggered the low-voltage cutoff at the expected threshold without latching the battery into lockout.
• Fuel gauge recalibration on first install: After fitting this cell, let the phone discharge fully to auto-shutdown, then charge uninterrupted to 100% before use. The SGH-A767's fuel gauge IC was calibrated to the old cell's discharge curve — one complete cycle overwrites that baseline so the percentage readout reflects the new cell accurately.

Why the SGH-A767 reports the wrong battery percentage after a cell swap

The SGH-A767 uses a coulomb-counting fuel gauge IC that builds its state-of-charge model from the discharge curve of the cell it learned on. When you fit a new cell, the IC still references the degraded curve from the old battery, so it may show 40% while the phone is actually at 70%, or vice versa. This mismatch clears after one full discharge-to-shutdown followed by a complete uninterrupted charge to 100%. After that single calibration cycle, the percentage display tracks the new cell's actual curve correctly.

Sudden shutdown at 20–30% on the replacement cell

This happens when the fuel gauge IC hasn't yet recalibrated and the phone hits a voltage cliff before the displayed percentage reaches zero. Under peak load — backlight, radio transmit, and keypad all active simultaneously — the cell voltage briefly sags below the BMS cutoff threshold even though the counter still shows charge remaining. The phone shuts off to protect the cell, not because the cell is faulty. Run the full discharge-recharge calibration cycle described above; if the shutdowns continue after two full cycles, check that the battery contacts are clean and making firm contact — oxidised pins on the 3-pin strip cause intermittent voltage drops at that exact load spike.