About this replacement
Samsung Galaxy Ace Style SM-G310 — 3.8V Li-ion Replacement Battery (EB-B130BE)
This is a 3.8V, 1500mAh Li-ion replacement battery for the Samsung Galaxy Ace Style SM-G310 series, including SM-G310A, SM-G310H, and SM-G310HN. It replaces OEM part numbers EB-B130BE, EB-BG313BBE, and GH43-04256A. Fit it when the original cell no longer holds charge through a normal day of use.
- SM-G310 series compatibility: All SM-G310 variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The 59.73 × 50.48 × 4.25mm cell slots directly into the same physical cavity without modification.
- Bench tested on actual hardware: We ran this cell on an SM-G310H unit and confirmed the BMS completed a full charge cycle without tripping low-voltage cutoff. Charge acceptance was stable from 3.0V up to the 4.35V termination point the device expects.
- Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. This gives the fuel gauge IC time to map the new cell's discharge curve before it begins tracking state-of-charge. Skipping this step is why many users see erratic percentage readings in the first day.
Why the SM-G310 reports wrong battery percentage after a cell swap
Samsung's fuel gauge IC stores a learned discharge curve from the previous cell. When a new cell goes in, that stored curve no longer matches the actual voltage-to-capacity relationship of the replacement. The IC keeps reading against the old data until it runs a full cycle and relearns. This causes the percentage to jump or freeze at values that don't reflect real charge state. One full uninterrupted discharge followed by a full charge resolves it.
Sudden shutdown at 20–30% on the SM-G310
This happens when the cell voltage drops below what the modem or display load requires, even though the reported percentage still looks safe. The fuel gauge IC is reading a stale discharge curve and misreports remaining capacity right before the cell hits its voltage floor. Under burst load — a call, a screen wake, mobile data — the cell can't sustain voltage and the protection circuit cuts out instantly. After completing a full recalibration cycle, check that shutdown no longer occurs above 3.5V terminal voltage.