Samsung Galaxy J3 2017 EB-BJ330ABE Replacement Battery 3.85V 2400mAh

Samsung Galaxy J3 2017 — 3.85V Li-Polymer Replacement Battery (EB-BJ330ABE)

This is a 3.85V, 2400mAh Li-Polymer replacement battery for the Samsung Galaxy J3 2017. It fits the SM-J330G, SM-J330L, and related TD-LTE variants using OEM part number EB-BJ330ABE. Swap it when the original cell no longer holds adequate charge or the phone powers off unexpectedly under normal use.

• SM-J330 series compatibility: The SM-J330G, SM-J330L, and TD-LTE variants all share the same 3.85V battery bay, connector pinout, and BMS handshake protocol — one cell fits across the entire J3 2017 lineup.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on SM-J330 hardware. The BMS accepted the cell without error codes, charge IC stepped through trickle, CC, and CV phases cleanly, and capacity landed within 2% of rated 2400mAh on the second cycle.
• Fuel gauge recalibration after install: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell — reducing the risk of erratic percentage readings early on.

Sudden shutdown at 20–30% on the replacement cell

This is a voltage cliff problem, not a capacity problem. When the modem transmits or the screen brightness peaks, current draw spikes and the cell voltage drops sharply. If the fuel gauge IC is still calibrated to the old cell's discharge curve, it misreads remaining capacity and the phone shuts down before the gauge hits zero. The fix is one full, uninterrupted discharge-charge cycle with fast charging off. After that cycle, the coulomb counter resets against the new cell's actual voltage curve and the shutdowns stop.

Phone warm near the battery during the first few charges

A new Li-Polymer cell typically has higher internal impedance than a well-cycled one. The charge IC on the J3 2017 runs constant-current phase at the same rate regardless, so more energy converts to heat inside a fresh, high-impedance cell. This is normal for the first two to three cycles and fades as the cell's impedance drops. If warmth persists beyond the third full charge, check that the battery connector is fully seated — a partial connection raises contact resistance and adds heat at the joint. The phone should feel cool to the touch by the fourth cycle.