About this replacement
BlackView Tab 9 10.1-Inch — 3.8V Li-Polymer Replacement Battery
This is a 3.8V Li-Polymer battery rated at 7400mAh (28.12Wh) for the BlackView Tab 9 and Tab 9 10.1-Inch Android tablet. It replaces the original cell when capacity has dropped and the tablet no longer holds a charge through a normal day of use. Voltage and connector specs match the original battery bay on this model.
- Tab 9 and Tab 9 10.1-Inch fit: Both listed models share the same cell format, voltage rail, and BMS handshake requirements. The same 3.8V Li-Polymer cell fits both without modification.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on a Tab 9 unit. The BMS accepted the cell cleanly, charge IC engaged without fault codes, and voltage held steady across display-on and WiFi-active load conditions.
- Post-swap fuel gauge reset: After installing this battery, run one full discharge to automatic shutoff, then charge uninterrupted to 100%. The Tab 9's fuel gauge IC is calibrated to the old cell's internal resistance profile — one complete cycle resets it against the new cell and clears the inaccurate percentage reading that appears immediately after a swap.
Tab 9 shutting down at 15–25% remaining
This happens when the display and WiFi radio draw current simultaneously, pulling the cell voltage below the BMS cutoff threshold before the reported percentage reaches zero. An aged original cell shows this earlier because its internal resistance amplifies voltage sag under combined load. A new cell with lower internal resistance reduces the sag, but the fuel gauge still needs recalibration to map the shutoff point accurately. Run one full cycle after installation and the shutdowns at false percentages will stop.
Fast charging not available after battery swap on the Tab 9
The Tab 9 charge IC negotiates the fast charge protocol on the first accepted charge cycle after a new cell is fitted. If fast charge shows as unavailable immediately after installation, that is expected — the handshake has not completed yet. Plug in with the original charger and let the first charge run to 100% without interruption. Fast charge availability restores once the charge IC has logged one complete accepted cycle against the new cell.