Samsung Galaxy J1 Ace VE Duos Replacement Battery EB-BJ111ABE 3.8V

Samsung Galaxy J1 Ace VE Duos — 3.8V Li-ion Replacement Battery (EB-BJ111ABE)

This is a 3.8V, 1800mAh Li-ion cell replacing the original battery in the Samsung Galaxy J1 Ace VE Duos and J1 Ace VE Duos LTE. It fits SM-J111M/DS, SM-J111F/DS, and related variants that share the same physical footprint and connector. Swap it in when your original cell no longer holds a charge or the phone shuts down unexpectedly.

• J1 Ace VE Duos series fit: The SM-J111 variants share a common battery bay geometry and a single-cell 3.8V supply rail with no BMS handshake protocol — meaning the phone draws directly from the cell without proprietary authentication. Any cell matching voltage, physical dimensions, and connector orientation will be recognised by the charge IC.
• Bench tested on actual hardware: We ran charge-discharge cycles on SM-J111 hardware and confirmed the charge IC accepts the cell at 4.2V cutoff, the BMS does not trip on normal screen-on loads, and the cell holds within spec across multiple cycles.
• Fuel gauge recalibration on first use: After fitting this cell, disable fast charging and run one full discharge to below 10%, then charge uninterrupted to 100%. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging begins on an uncalibrated state-of-charge register.

Why the Galaxy J1 Ace VE reports wrong battery percentage after a cell swap

The phone uses a coulomb-counter-based fuel gauge IC that builds its state-of-charge model from the original cell's discharge curve. When you install a new cell, the IC still references the old curve — so it can show 40% when the actual cell voltage is already near the low-voltage cutoff. The gauge corrects itself after one or two full discharge-charge cycles. Until then, percentage readings will drift, especially at the top and bottom 15% of the range.

Sudden shutdown at 20–30% on the replacement cell

This happens because the modem radio and display draw a combined current spike that the cell cannot sustain at that state of charge — the cell voltage drops below the 3.4V cutoff threshold faster than the fuel gauge predicts. It is a calibration gap, not a defective cell. Run two full discharge-charge cycles without interruption and the fuel gauge IC will recalculate the voltage-to-capacity mapping. After calibration, the phone should not cut off until cell voltage drops below 3.4V under load.