About this replacement
Samsung Galaxy Core 2 — 3.8V Li-ion Replacement Battery (EB-BG355BBE)
This is a 3.8V, 2000mAh Li-ion replacement battery for the Samsung Galaxy Core 2. It fits SM-G355 and SM-G355H variants and slots into the same compartment as the original EB-BG355BBE cell. Capacity figure is 2000mAh as listed in the product specification.
- SM-G355 and SM-G355H compatibility: Both handset variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The EB-BG355BBE part number covers all regional SM-G355 builds, so one cell fits both.
- Bench tested on actual hardware: We ran this cell through a full charge and discharge cycle on an SM-G355H. The BMS accepted the charge IC handshake without fault flags, and cell voltage held above 3.6V across a standard draw load.
- First-cycle fast charge precaution: On first use after installation, disable fast charging for one complete discharge-charge cycle. This allows the fuel gauge IC to recalibrate its discharge curve against the new cell before high-current charging pushes amperage into an uncalibrated coulomb counter.
Sudden shutdown at 20–30% on the Galaxy Core 2 after a cell swap
The SM-G355 uses a coulomb-counter fuel gauge IC that builds its discharge model from previous cell behaviour. After a cell swap, the IC still references the old cell's voltage-to-capacity curve. When the modem transmits or the screen brightness peaks, current draw spikes and the new cell's voltage briefly dips below the IC's cutoff threshold — even though actual charge remains. The phone interprets the voltage dip as empty and shuts down. One full discharge-to-3.4V then full charge cycle forces the IC to rewrite its reference curve to match the new cell.
OS reporting wrong battery percentage after installing the EB-BG355BBE
Percentage jumping or sticking at an incorrect value is a fuel gauge calibration issue, not a faulty cell. The Android battery stats file on the SM-G355 stores the old cell's discharge profile in the device partition. Clear the battery stats cache by fully draining the phone until it powers off, then charge uninterrupted to 100% with the device off. After two cycles of this, the reported percentage should track actual cell voltage within a normal margin.