BlackView Tab 8 Replacement Battery 3.7V 6500mAh 32100140

BlackView Tab 8 — 3.7V Li-Polymer Replacement Battery (32100140)

This 3.7V, 6500mAh lithium-polymer battery replaces the original cell in the BlackView Tab 8 tablet. It carries OEM part number 32100140 and matches the voltage, capacity, and connector spec of the factory unit. Fits the Tab 8 only — verify your model before ordering.

• BlackView Tab 8 fitment: The Tab 8 runs a single-cell Li-Polymer pack at 3.7V nominal with a proprietary flat connector. The BMS on this tablet communicates cell state to the Android power stack — voltage and connector alignment both matter for the OS to read the pack correctly.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Tab 8 platform. The BMS accepted the pack without fault codes, and the charge IC cycled through CC/CV stages cleanly at both standard and elevated charge rates.
• Fuel gauge recalibration after swap: After fitting this battery, run one full discharge to automatic shutoff, then charge uninterrupted to 100%. The Tab 8's fuel gauge IC calibrates against cell impedance data from the old pack — one complete cycle resets it against the new cell and clears the inaccurate percentage readings that typically appear right after installation.

Why the BlackView Tab 8 shuts down at 15–25% remaining

Under combined display and Wi-Fi load, the Tab 8 draws enough current to drag cell voltage below the BMS cutoff threshold even when the reported percentage still looks healthy. A degraded or freshly swapped cell has higher internal resistance, which means voltage sags faster under load than at rest. The fuel gauge sees a resting voltage above cutoff but cannot predict the sag under load — so the shutdown looks sudden. After the recalibration cycle above, the gauge maps the new cell's actual discharge curve and the premature shutdowns stop.

Fast charging not available after battery replacement

The Tab 8 charge IC runs a negotiation handshake on the first accepted charge cycle before enabling higher charge rates. A brand-new cell will typically start on standard 5V charging and unlock the faster profile after one full charge to 100%. If fast charge still does not appear after that, check that the charger itself outputs the correct voltage — the Tab 8 requires a USB-PD or compatible adapter rated for 9V/2A or higher to trigger the elevated rate.