About this replacement
Samsung Galaxy Ace 2 GT-I8160 — 3.8V Li-ion Replacement Battery (EB425161LU)
This is a 3.8V, 1500mAh Li-ion battery for the Samsung Galaxy Ace 2 and its variants, including the GT-I8160, GT-I8160P, and GT-S7562. It replaces OEM part numbers EB425161LU and EB425161LA. It fits devices where the original cell has lost capacity or fails to hold a charge through normal daily use.
- GT-I8160 and GT-S7562 platform fit: Both handsets run the same 3.8V battery rail and use the same connector pinout and BMS handshake protocol. One cell covers both device lines without modification.
- Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a GT-I8160 unit. The BMS accepted the new cell without error flags, and the charge IC handed off cleanly at 4.2V terminal voltage.
- Fuel gauge recalibration on first use: On first installation, disable any fast-charge mode and run one complete discharge-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes into an uncalibrated state.
Sudden shutdown at 20–30% on the Galaxy Ace 2 after a cell swap
The Galaxy Ace 2's fuel gauge IC holds a discharge curve learned from the original cell. A new cell with a different internal resistance profile hits a voltage cliff at moderate state-of-charge that the old curve didn't predict. The phone's protection circuit reads voltage dropping below the modem load threshold and shuts down — even though capacity remains. One full discharge to automatic power-off, followed by a full charge without interruption, forces the coulomb counter to relearn the new cell's curve and moves the cutoff point down to where it belongs.
Phone warm near the battery during the first few charges after replacement
A new Li-ion cell has higher internal impedance than a broken-in cell. During the first several charge cycles, the charge IC pushes current into that higher resistance, generating more heat than normal. This is expected and tapers off as the cell's impedance settles over three to five cycles. If heat persists beyond five full cycles or the phone becomes uncomfortable to hold, check that the charge IC is not stuck in fast-charge mode — force standard 5V/1A charging for the next cycle.