Samsung Galaxy Ace 2 B150AE Replacement Battery 3.7V 1600mAh

Samsung Galaxy Core / Core Duos GT-I8260 — 3.7V Li-ion Replacement Battery (B150AE)

This is a 3.7V, 1600mAh Li-ion replacement battery for the Samsung Galaxy Core and Galaxy Core Duos, covering GT-I8260, GT-I8262, and related variants. It matches the original B150AE cell specification and slots into the same battery bay without modification. Also cross-references OEM part numbers B150AC, B185BE, B185BC, and GH43-03849A.

• GT-I8260 and GT-I8262 platform fit: Both the single-SIM Core and the Duos dual-SIM variant share the same 3.7V battery bay, connector pitch, and BMS handshake — one cell covers both boards without firmware conflict.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on GT-I8260 hardware. The BMS accepted charge current on the first connection, and the protection circuit tripped correctly at the low-voltage threshold.
• Fuel gauge recalibration on first cycle: After fitting this cell, run one full discharge to automatic cutoff, then charge to 100% without interruption. The phone's fuel gauge IC maps its coulomb counter to the new cell's discharge curve during that first cycle — skipping it causes the percentage display to read inaccurately for several days.

Why the Galaxy Core reports wrong battery percentage after a cell swap

The GT-I8260 uses a fuel gauge IC that stores a learned discharge curve from the previous cell. When a new cell goes in, that stored curve no longer matches actual cell chemistry or internal resistance. The IC keeps calculating state-of-charge against the old profile, so the percentage shown is off — sometimes by 15–20 points. One complete discharge-charge cycle forces the coulomb counter to reset and relearn against the new cell. After that cycle, readings stabilise at the correct voltage-to-percentage mapping.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops sharply under combined modem and display load — a voltage cliff the fuel gauge did not predict because it was still using the old discharge curve. The phone hits the hardware undervoltage cutoff before the reported percentage reaches zero. The fix is the same first-cycle recalibration: discharge the phone until it shuts off on its own, then charge uninterrupted to 100%. Once the fuel gauge IC has a calibrated curve for this cell, it raises the shutdown trigger to the correct voltage point — typically around 3.4V under load.