About this replacement
Alcatel Tab 8 / 9048S — 3.8V Li-Polymer Replacement Battery (TLP053C1)
This is a 3.8V, 5000mAh (19Wh) Li-Polymer replacement battery for the Alcatel Tab 8 (model 9048S). It uses OEM part number TLP053C1 and fits directly into the tablet's battery bay. If your Tab 8 won't hold a charge, shuts down unexpectedly, or the battery percentage jumps around, this replaces the degraded cell.
- Tab 8 / 9048S fitment: Both the Tab 8 and its 9048S variant share the same battery bay dimensions and the same BMS connector pinout. The TLP053C1 uses a flat Li-Polymer cell at 118.30 × 104.00 × 3.20mm — any thicker and the back cover won't seat correctly.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Tab 8 platform. The BMS accepted the charge IC handshake without faults, and cell voltage held steady at 3.8V nominal with no thermal trips during testing.
- Fuel gauge recalibration after swap: After fitting this battery, run the tablet down to automatic shutoff — don't force-power it off — then charge it in one uninterrupted session to 100%. The fuel gauge IC calibrates itself against the new cell during that first full cycle. Skip this step and the percentage display will drift.
Why the Tab 8 shuts down at 15–25% after a battery swap
The Tab 8's fuel gauge IC stores learned discharge curves from the old cell. When a new cell goes in, those curves no longer match the actual voltage profile of the replacement. Under combined display-plus-WiFi load, the chip sees a faster voltage drop than its model predicts and triggers a low-battery shutdown early. This is a calibration issue, not a defective battery. Running one full discharge-to-shutoff cycle followed by an uninterrupted full charge resets the learned curve and brings the shutoff threshold back in line with the actual cell state.
Fast charging not available after fitting the TLP053C1
Some Tab 8 units withhold fast-charge negotiation until the charge controller has completed at least one accepted charge cycle with the new cell. If fast charging doesn't activate immediately after the swap, plug in using the original charger and let the tablet charge to 100% without interruption. After that first full cycle completes, fast-charge negotiation resumes normally. Switching to a third-party charger before that first cycle finishes can delay the handshake further — use the original adapter for the first charge.