Logicom L-ement Tab 741 Compatible Battery 3.8V 2300mAh

Logicom L-ement Tab 741 — 3.8V Li-Polymer Replacement Battery (El-357090p-003-268)

This 3.8V, 2300mAh Li-Polymer cell replaces the original battery in the Logicom L-ement Tab 741 tablet. It matches the OEM part number El-357090p-003-268 and fits the physical bay at 87.10 × 63.70 × 3.40mm. Capacity is rated at 8.74Wh, matching the stock specification.

• L-ement Tab 741 fitment: This cell is keyed to the Tab 741's connector pinout and BMS handshake protocol. Swapping a cell with mismatched impedance or voltage tolerance can cause the charge IC to reject the cell entirely or report incorrect state-of-charge figures from the first cycle.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge passes on the Tab 741 platform. The BMS accepted the cell without rejection flags, and the charge IC held a stable current profile through both trickle and constant-current phases.
• Fuel gauge recalibration on first use: After installing this cell, disable fast charging and run one complete discharge-to-charge cycle before resuming normal use. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging begins on an uncalibrated cell.

Why the L-ement Tab 741 reports wrong battery percentage after a cell swap

The Tab 741 uses a fuel gauge IC that builds its state-of-charge model against the old cell's impedance profile. When a new cell goes in, the stored curve no longer matches the actual discharge behaviour of the replacement. The gauge compensates by jumping or locking to inaccurate percentages until it accumulates enough cycle data to rebuild the model. One full discharge from 100% to automatic cutoff, followed by a complete charge, forces the coulomb counter to reset and recalibrate to the new cell.

Sudden shutdown at 20–30% on the replacement cell

This happens when the fuel gauge IC has not yet recalibrated and the displayed percentage no longer reflects the cell's actual resting voltage under load. The screen or connectivity stack draws a current spike that drops cell voltage below the BMS cutoff threshold — even though the gauge still reads 20–30%. The tablet shuts off to protect the cell from over-discharge. Run the recalibration cycle described above; after one full discharge-charge pass, the gauge aligns the cutoff trigger to the correct voltage window, typically around 3.2–3.4V under load.