Coolpad Catalyst 3622A CPLD-390 Replacement Battery 3.7V 2200mAh

Coolpad Catalyst 3622A — 3.7V Li-Polymer Replacement Battery (CPLD-390)

This is a 3.7V, 2200mAh lithium-polymer cell built to the CPLD-390 specification. It fits the Coolpad Catalyst 3622A smartphone. Voltage and form factor match the original — dimensions are 71.00 x 52.98 x 5.00mm, so the cell seats flush in the battery bay.

• Catalyst 3622A fitment: The 3622A uses a fixed connector pinout tied to a basic fuel gauge IC. This replacement carries the same pin configuration and impedance profile, so the charge IC recognises it without a handshake error on boot.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a 3622A unit. The BMS accepted the cell, held voltage above 3.5V under display and modem load, and showed no unexpected cutoff during the test runs.
• Fuel gauge recalibration on first use: After fitting this cell, disable fast charging if available and run one full discharge down to auto-shutoff, then charge to 100% uninterrupted. This gives the fuel gauge IC one clean reference cycle against the new cell's discharge curve before the OS starts reporting percentage from it.

Sudden shutdown at 20–30% on the replacement cell

This happens because the fuel gauge IC is still using the discharge curve it mapped on the old, degraded cell. A fresh cell with higher energy density hits a different voltage cliff point than the IC expects. The phone interprets the voltage drop under modem or screen load as a critical low-battery condition and shuts down — even though real charge remains. One complete discharge-to-shutoff and full recharge cycle resets the coulomb counter and corrects the curve. After that cycle, shutdowns at 20–30% typically stop.

Phone not powering on after the replacement cell sat in storage

Li-polymer cells self-discharge during storage. If this cell dropped below 2.5V, the BMS may have entered lockout mode to prevent over-discharge damage. Plug the phone into a wall charger — not a PC USB port — and leave it for 20–30 minutes without pressing the power button. The charge IC needs time to push a recovery trickle current through the BMS lockout threshold. Once the cell climbs back above 3.0V, the BMS releases and the phone should power on normally.