Coolpad Rogue 4G Compatible Battery CPLD-365 3.8V 1500mAh

Coolpad Rogue 4G / 3320A — 3.8V Li-Polymer Replacement Battery (CPLD-365)

This is a 3.8V, 1500mAh Li-Polymer replacement battery for the Coolpad Rogue 4G and 3320A smartphones. It replaces OEM part number CPLD-365. Fit this battery when the original cell no longer holds a charge, causes unexpected shutdowns, or fails to power the phone on.

• Rogue 4G and 3320A compatibility: Both models share the same battery bay dimensions, 3.8V nominal voltage rail, and BMS connector pinout — one cell covers both. The physical footprint is 65.30 × 47.04 × 4.12mm, matching the OEM tray without modification.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on a Coolpad Rogue 4G unit. The BMS handshake completed on first connection, charge termination triggered correctly at 4.35V, and the fuel gauge IC accepted the new cell without throwing a fault.
• First-cycle fuel gauge recalibration: After fitting this cell, disable fast charging and run one complete discharge-to-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before any high-current session pushes current into an uncalibrated profile.

Why the Rogue 4G reports the wrong battery percentage after a cell swap

The Coolpad Rogue 4G uses a fuel gauge IC that builds its capacity model from accumulated charge and discharge data on the original cell. When you fit a new cell, that stored model no longer matches the actual discharge curve. The phone reads a voltage point and maps it to an old curve, so the percentage shown is off — sometimes by 15–20%. One full discharge-charge cycle at standard rate forces the IC to rebuild its coulomb counter baseline against the new cell. After that cycle, percentage accuracy returns to normal.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem radio or screen backlight draws a current spike and the cell voltage drops sharply — the BMS reads this as a low-voltage fault and cuts power before the displayed percentage reaches zero. It is a fuel gauge calibration problem, not a faulty battery. The new cell's actual voltage cliff sits at a different point than the IC expects from the old cell data. Run two full discharge-charge cycles at standard rate; once the coulomb counter recalibrates, the shutdown threshold aligns correctly and the phone stays on past 20%.