About this replacement
Coolpad Snap 3312A — 3.7V Li-ion Replacement Battery (CPLD-194)
This is a 3.7V, 1300mAh (4.81Wh) Li-ion battery for the Coolpad Snap and 3312A smartphones. It replaces OEM part CPLD-194 and fits the phone's compact battery bay with the original connector and contact layout. Swap this in when the original cell no longer holds a usable charge.
- Snap and 3312A compatibility: Both models run the same 3.7V single-cell platform with an identical physical footprint and contact pinout — one battery covers both variants without modification.
- Bench tested on actual hardware: We cycled the cell through charge and discharge on the Snap platform and confirmed the BMS handshake completes correctly, with the charge IC accepting the cell and entering CC/CV charge as expected.
- Fuel gauge recalibration after swap: On first use after installation, disable fast charging for one full discharge-charge cycle. This lets the fuel gauge IC map its coulomb counter against the new cell's discharge curve before high-current charging is applied to an uncalibrated cell.
Sudden shutdown at 20–30% on the Coolpad Snap after a cell replacement
The Snap's fuel gauge IC stores a discharge model calibrated to the original cell. A new cell has a different internal resistance and voltage-discharge curve, so the IC misreads state of charge. When the modem transmits or the screen brightness spikes, current draw pulls cell voltage below the BMS cutoff threshold — even though the displayed percentage still reads high. The fix is one full uninterrupted discharge to auto-off, then a full charge to 100% without interruption. After that cycle, the coulomb counter resets its zero-point against the actual cell curve and shutdowns stop.
Phone feels warm near the battery during the first few charges
A new Li-ion cell starts with slightly higher internal impedance than a broken-in cell. The charge IC drives the same constant-current rate regardless, so more energy is lost as heat across that impedance in early cycles. This is not a fault — it normalises after three to five full cycles as the cell's internal resistance drops. If warmth persists past the fifth cycle or the phone becomes hot to the touch, measure the charge voltage at the USB port and confirm it does not exceed 5.2V.