ZTE K88 Tablet Li-Polymer Compatible Battery 3.8V 4600mAh

ZTE K88 — 3.8V Li-Polymer Replacement Battery (Li3846T43P6hF07632)

This is a 3.8V, 4600mAh Li-Polymer battery for the ZTE K88 Android tablet. It replaces OEM part number Li3846T43P6hF07632. Capacity and connector type match the original cell, so no hardware modification is needed during installation.

• ZTE K88 fitment: The K88 uses a fixed 3.8V single-cell Li-Polymer configuration. The BMS on this tablet monitors cell voltage directly and will reject cells outside its accepted voltage window — this battery sits within that window and passes the handshake on power-up.
• Bench tested on actual hardware: We cycled this battery through charge and discharge on the K88 platform. The charge IC accepted the cell on the first cycle, BMS communication stayed active throughout, and the tablet held display and Wi-Fi load without triggering a low-voltage cutoff early.
• Fuel gauge recalibration after swap: After installing this battery, run the tablet down to automatic shutoff — do not force it off. Then charge uninterrupted to 100%. This single full cycle resets the fuel gauge IC against the new cell's actual discharge curve and clears the inaccurate percentage readings that almost always appear after a battery swap.

ZTE K88 shutting down at 15–25% battery remaining

This happens because the tablet's fuel gauge IC is still calibrated to the old cell's voltage curve. When the new cell hits a voltage drop under combined display and Wi-Fi load, the IC interprets it as a critically low state and triggers shutdown — even though the cell still has usable charge. The fix is one complete discharge-to-shutoff followed by a full uninterrupted charge to 100%. After that cycle, the fuel gauge maps the new cell correctly and shutdowns stop occurring above 10%.

Fast charging not available on the K88 after battery replacement

The K88's charge controller uses a negotiation step on the first accepted charge cycle to confirm cell parameters before enabling higher charge rates. A freshly installed battery often completes its first cycle at standard rate — this is normal behaviour, not a fault with the battery or charger. Plug in using the original ZTE charger and cable, let the first charge run to 100% without interruption, then unplug and reconnect. Most users see fast charge re-enable on the second connection once the controller has logged the completed cycle.