Wiko Lenny 5 Compatible Battery 3.8V 2600mAh 115823

Wiko Lenny 5 — 3.8V Li-ion Replacement Battery (115823)

This is a 3.8V, 2600mAh (9.88Wh) Li-ion battery for the Wiko Lenny 5 smartphone. It replaces OEM part number 115823 and fits the Lenny 5 only — confirm your model before ordering. Capacity matches the original cell specification pulled from the product data.

• Lenny 5 fitment: The Lenny 5 uses a removable cell format with a fixed connector pinout and BMS handshake tied to the 3.8V nominal rail. This replacement matches that voltage and connector spec so the phone's charge IC recognises the cell without throwing a battery error on boot.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench. The BMS held cutoff cleanly at both ends — no premature low-voltage trip and no overcharge overshoot past 4.35V. Capacity output tracked within expected range of the rated 2600mAh.
• First-cycle fuel gauge recalibration: On first use after installation, disable fast charging and run one complete discharge down to automatic shutdown, then charge fully to 100%. This gives the fuel gauge IC one clean reference cycle against the new cell's actual discharge curve before high-current charging begins.

Why the Lenny 5 reports wrong battery percentage after a cell swap

The Lenny 5 uses a coulomb-counter-based fuel gauge IC that builds its percentage model from the original cell's charge and discharge history. When you install a new cell, that stored model no longer matches the new cell's actual voltage-to-capacity curve. The phone may show 100% at 4.1V or drop suddenly from 40% to shutting down. One full discharge-to-shutdown followed by a full uninterrupted charge to 100% resets the coulomb counter against the new cell and restores accurate percentage reporting.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem, screen backlight, or both spike current demand faster than the cell can sustain voltage. A new cell with an uncalibrated fuel gauge reads 25% remaining, but under load the voltage collapses below the BMS cutoff threshold — typically around 3.0V — and the phone shuts off as a protection measure. It is not a faulty battery. Run the calibration cycle described above: one full discharge to automatic shutdown, then charge to 100% without interruption. After that cycle, the fuel gauge tracks the voltage cliff accurately and the percentage figure at shutdown will be close to 0%.