BLU Deejay Lite Replacement Battery 3.7V 900mAh C4C60T

BLU Deejay Lite / Click Lite / Flash — 3.7V Li-ion Replacement Battery (C4C60T)

This 3.7V, 900mAh Li-ion cell replaces the original battery in the BLU Deejay Lite, Click Lite, Flash, TV2Go, and over a dozen additional BLU models sharing the same OEM part numbers C4C60T, C4C08T, C4C85T, and C4C50T. Physical dimensions are 53.00 × 34.00 × 4.80mm — confirm these against your current cell before ordering. Voltage and connector pinout match the original BLU specification.

• Multi-model fit — shared cell platform: These BLU models share a common 3.7V battery footprint, connector type, and BMS communication protocol. The same cell and protection circuit board satisfies the charge IC handshake across the Deejay Lite, Click Lite, Flash, and TV2Go platforms without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on BLU hardware with the same charge IC. The BMS accepted the charge controller handshake cleanly, and protection circuits responded correctly to both overvoltage and undervoltage cutoff thresholds.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-charge cycle from full to flat. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging begins on an uncalibrated cell.

Sudden shutdown at 20–30% on the replacement cell

The BLU Deejay Lite's charge IC uses a coulomb counter calibrated to the old cell's internal resistance and discharge curve. A new cell has different impedance characteristics, so the fuel gauge IC misreads remaining capacity and triggers a low-voltage cutoff earlier than the displayed percentage suggests. Under modem or screen load, the voltage cliff arrives faster than the gauge predicts. One full discharge-charge cycle — taken without fast charging — forces the coulomb counter to remap against the new cell. After that cycle, shutdowns at 20–30% typically stop.

Phone warm near the battery during the first few charges

A new Li-ion cell has higher internal impedance than a worn cell the charge IC was previously calibrated against. During the first charge cycles, the IC may push current into the cell at a rate that generates more heat than usual as impedance normalises. This is transient — it reduces after two or three full cycles as the cell's internal resistance settles. If warmth continues past three full cycles or the phone becomes hot to the touch, remove the charger and check for a pinched connector seating on the replacement cell.