About this replacement
Samsung Galaxy J2 / SM-J200H — 3.8V Li-ion Replacement Battery (EB-BG360CBC)
This is a 3.8V, 2000mAh Li-ion cell replacing the original battery in the Samsung Galaxy J2 and Galaxy J2 Duos. It fits SM-J200H/DS, SM-J200H/DD, and the wider SM-J200 family sharing the EB-BG360CBC form factor. Swap it in when the original cell no longer holds charge through a normal day of calls, messaging, and app use.
- SM-J200 platform compatibility: Every model in this list shares the same 3.8V contact rail, physical footprint, and connector orientation. The J2 and J2 Duos use identical battery bays, so one cell covers both single and dual-SIM variants without modification.
- Bench tested on actual hardware: We cycled this cell on an SM-J200H unit and confirmed the BMS accepted charge current immediately, with the protection circuit tripping correctly at the low-voltage cutoff threshold rather than allowing over-discharge.
- Fuel gauge recalibration after installation: On first use after fitting this cell, run one full discharge down to automatic shutdown, then charge uninterrupted to 100% before using the phone normally. The Galaxy J2 fuel gauge IC maps its coulomb counter to the discharge curve of the previous cell — one full cycle corrects the reference and stops erratic percentage readings.
Why the Galaxy J2 reports wrong battery percentage after a cell swap
The SM-J200 series uses a fuel gauge IC that tracks charge state by counting coulombs against a stored discharge curve from the previous cell. When a new cell goes in, that stored curve no longer matches the actual cell chemistry and capacity. The gauge reads as if the old, degraded cell is still present, so it reports percentages that jump or drop sharply. One complete discharge-to-shutdown followed by a full uninterrupted charge resets the reference and brings the displayed percentage back in line with actual cell state.
Sudden shutdown at 20–30% on the replacement cell
This happens because the fuel gauge IC has not yet recalibrated to the new cell's voltage cliff. The original degraded cell had a flat discharge curve that dropped off slowly; the new cell holds voltage longer but cuts sharply near the bottom of its range. The phone's power management reads a voltage that the old curve maps to 20–30% remaining, but the new cell is already near its minimum sustain voltage under modem and screen load. Run one full discharge cycle to automatic shutdown — after that cycle the gauge maps the correct knee voltage, typically around 3.4–3.5V, and the premature shutdowns stop.