About this replacement
Samsung Galaxy Tab S10+ — 3.86V Li-Polymer Replacement Battery (EB-BX828ABE)
This 3.86V, 9800mAh (37.83Wh) Li-Polymer battery replaces the original EB-BX828ABE cell in the Samsung Galaxy Tab S10+. It fits SM-X620, SM-X626, SM-X820, and related variants. Install it when the original cell no longer holds a usable charge across a full day of tablet use.
- Tab S10+ platform fit: The SM-X820 and SM-X626 variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol — all confirmed against the EB-BX828ABE specification. One replacement cell covers both Wi-Fi and LTE configurations.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Galaxy Tab S10+ unit. The BMS accepted the new cell without fault codes, completed a full charge sequence, and held the final voltage within spec at 4.35V cutoff.
- Fuel gauge recalibration after swap: After installation, run the tablet down to automatic shutoff, then charge uninterrupted to 100% without using the device. This single full cycle lets the fuel gauge IC map its thresholds against the new cell and eliminates the erratic percentage readings that commonly appear after a battery swap.
Galaxy Tab S10+ shutting down at 15–25% remaining
This happens when the fuel gauge IC still holds calibration data from the old, degraded cell. The new cell has a steeper voltage curve under the combined load of the AMOLED display and active Wi-Fi, causing the system to read 0% before the cell is actually depleted. The BMS triggers a protective shutdown at what it calculates as the low-voltage floor. Run one full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% — the fuel gauge resets its discharge curve and the shutdowns stop.
Fast charging not available after battery replacement
Samsung's adaptive fast charge and USB-PD negotiation can stall on the first charge cycle after a new cell is installed, showing only standard charge speeds. The charge IC on the new cell needs one complete accepted charge handshake before the tablet's power management layer re-enables the higher-current protocol. Plug into the original Samsung 45W adapter — not a third-party charger — and leave the tablet undisturbed for the full first charge. Fast charging typically resumes from the second cycle onward.