About this replacement
Samsung Galaxy Tab A 8.0 — 3.7V Li-Polymer Replacement Battery (EB-BT355ABE)
This 3.7V, 4000mAh Li-Polymer battery replaces the OEM EB-BT355ABE cell in the Samsung Galaxy Tab A 8.0. It fits SM-T355, SM-T355C, SM-T357W, and related Tab A 8.0 variants. Dimensions are 113.90 x 93.60 x 2.50mm — same footprint as the original.
- SM-T355 series compatibility: The SM-T355, SM-T355C, and SM-T357W share the same battery bay geometry, connector pinout, and BMS handshake requirements. One cell part number covers the full group.
- Bench tested on actual hardware: We ran this cell on an SM-T355 and confirmed the BMS accepted the cell without error flags, charge IC initiated correctly, and the protection circuit responded to over-discharge conditions as expected.
- Fuel gauge recalibration after swap: After installing this battery, run one full discharge to automatic shutoff, then charge uninterrupted to 100%. This forces the fuel gauge IC to recalibrate against the new cell and clears the inaccurate percentage readings that commonly appear after a replacement.
Why the Tab A 8.0 shuts down at 15–25% after a battery swap
The Galaxy Tab A 8.0 uses a fuel gauge IC that stores charge curve data from the previous cell. When a new cell goes in, the IC is still referencing the old cell's voltage-to-capacity curve. Under combined display and Wi-Fi load, voltage drops faster than the IC predicts, and the tablet hits its low-voltage cutoff while the gauge still reads 15–25%. One full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% resets this curve against the new cell.
Fast charging unavailable after battery replacement on SM-T355
Some SM-T355 units stop offering fast charge after a battery swap. The charge IC negotiates charge rate on the first accepted charge cycle — if the tablet was powered on or restarted mid-charge during that first session, negotiation can fail and the device defaults to standard 5V charging. To recover, connect the original Samsung charger, power the tablet completely off, and allow one uninterrupted charge from below 10% to 100%. Fast charge availability should restore after that cycle completes.