ZTE V11A Tablet Replacement Battery LI3768T42P5HC8B645 3.7V

ZTE V11A / V11 / V7E — 3.7V Li-Polymer Replacement Battery (LI3768T42P5HC8B645)

This is a 3.7V, 6800mAh (25.16Wh) Li-Polymer replacement battery for the ZTE V11A, V11, and V7E tablets. It matches the OEM part number LI3768T42P5HC8B645 and fits the same cell bay without modification. Install it when the original cell no longer holds a charge or causes the tablet to shut down unexpectedly.

• V11A, V11, and V7E fit group: These three ZTE tablet models share the same physical cell format, connector pinout, and charge IC communication protocol — which is why a single SKU covers all three. The BMS negotiates directly with ZTE's charge controller on the same voltage rail across all variants.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on a V11A unit. The BMS handed off cleanly to the charge IC at 4.2V, and the protection circuit tripped correctly at the low-voltage cutoff. No anomalous heat, no charge refusal on the first cycle.
• Fuel gauge recalibration after swap: After installing this cell, run the tablet down to automatic shutoff — do not force it off manually — then charge it uninterrupted to 100%. This gives the fuel gauge IC a complete voltage curve against the new cell and clears the inaccurate percentage readings that almost always appear after a battery swap.

ZTE V11A shutting down at 15–25% remaining

This happens because the display backlight and active WiFi together create a combined load spike the aged cell can't sustain — voltage drops below the BMS cutoff threshold even though the fuel gauge still reads double digits. A new cell with full capacity eliminates the sag, but the fuel gauge IC is still calibrated to the old cell's voltage curve. Run one complete discharge-to-shutoff cycle after installation. The tablet should then track remaining charge accurately down to the correct cutoff point near 3.0V per cell.

Fast charging not available after fitting a replacement cell

ZTE's fast charge protocol requires the charge IC to complete one full accepted charge cycle before it unlocks higher current delivery to a new cell. On the first charge after a swap, the tablet will default to standard 5V charging — this is normal and not a fault with the battery or charger. Charge the tablet fully from near-empty once without interruption. On the second charge cycle, fast charge should re-engage automatically and the charge brick's indicator behaviour will return to normal.