Doogee Y6 Max BAT16514300 Replacement Battery 3.8V 4100mAh

Doogee Y6 Max — 3.8V Li-Polymer Replacement Battery (BAT16514300)

This is a 3.8V, 4100mAh (15.58Wh) Li-Polymer cell that replaces the original BAT16514300 battery in the Doogee Y6 Max smartphone. It fits the Y6 Max directly — same dimensions at 104.03 × 65.35 × 3.30mm and the same connector orientation. Use this when the original cell no longer holds a usable charge or the phone shuts down before the display reads zero.

• Y6 Max fit: The Y6 Max uses a sealed back panel with a fixed connector layout. This cell matches the BAT16514300 footprint exactly, so the flex cable reaches the board without tension and the adhesive layer sits flush against the chassis walls.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the bench. The BMS held protection cutoffs correctly at both ends — no false high-voltage trip on initial charge, and low-voltage cutoff triggered at the expected floor before the board could brown out.
• First-cycle fast charge caution: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell. Re-enable fast charge after that first full cycle.

Why the Y6 Max reports wrong battery percentage after a cell swap

The Y6 Max uses a fuel gauge IC that tracks charge state using a stored discharge curve from the original cell. When you fit a new cell, that stored curve no longer matches the actual electrochemistry of the replacement. The gauge reads the voltage and calculates percentage against old data, so the displayed figure drifts — often reading higher or lower than reality. One full discharge down to auto-off, followed by an uninterrupted charge to 100%, forces the IC to rewrite its reference curve against the new cell.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops sharply under load — the modem transmitting, the screen at full brightness, or GPS active all at once pulls more current than the gauge anticipated at that state of charge. If the cell voltage sags below the BMS protection floor before the OS sees it coming, the phone cuts power without warning. The fuel gauge IC hasn't yet mapped where the new cell's voltage cliff sits. Run two or three full discharge-charge cycles to let the coulomb counter locate the real cutoff point, and the premature shutdowns will stop.