About this replacement
Samsung Galaxy Tab S2 9.7 WiFi — 3.8V Li-Polymer Replacement Battery (EB-BT810ABE)
This 3.8V Li-Polymer battery replaces part number EB-BT810ABE in the Samsung Galaxy Tab S2 9.7. It fits SM-T810, SM-T815, SM-T815N0, SM-T817W, and over 23 additional SM-T8xx variants that share the same battery bay and connector. Capacity is 5800mAh (22.04Wh), matching the original cell specification.
- SM-T810 and SM-T815 series compatibility: These models share an identical battery form factor, connector pinout, and BMS handshake protocol. The flex connector locks to the same 6-pin board header across the entire Tab S2 9.7 lineup, so one cell covers all regional variants without modification.
- Bench tested on actual hardware: We cycled this cell in an SM-T810 unit through charge and discharge under combined WiFi and display load. The BMS responded correctly at low-voltage cutoff and did not trigger a false protection trip during high-brightness screen-on use.
- Fuel gauge recalibration after swap: After installing this battery, run the tablet down to automatic shutoff, then charge uninterrupted to 100% without interruption. This resets the fuel gauge IC against the new cell's actual capacity curve and clears the inaccurate percentage readings that typically appear immediately after a replacement.
Why the Tab S2 shuts down at 15–25% remaining
The SM-T810 runs a combined load spike when the display is at full brightness and WiFi is actively transferring data. At around 3.55V, this load causes a momentary voltage drop that crosses the BMS shutdown threshold before the fuel gauge IC reads 0%. The tablet interprets that voltage cliff as empty and cuts power, even though the reported percentage still shows charge remaining. A full recalibration cycle after battery installation teaches the fuel gauge where that cliff actually sits on the new cell.
Fast charging not available after battery swap on SM-T815
Some SM-T815 units stop offering fast charge immediately after a battery swap. The charge IC uses the first accepted charge cycle to negotiate current limits with the new cell's BMS. Until that first full cycle completes, the charger defaults to standard 5V/1A input as a precaution. Charge the tablet from under 10% to 100% in one uninterrupted session — fast charge typically resumes from the next session onward.