BLU HERO 3.7V Replacement Battery 850mAh C53380495T

BLU HERO / S190 / S180 — 3.7V Li-ion Replacement Battery (C53380495T)

This is a 3.7V, 850mAh Li-ion battery for the BLU HERO, S190, and S180 smartphones. It replaces part number C53380495T directly. If the original cell has degraded to the point of sudden shutdowns or poor standby, this is the direct swap.

• HERO, S190, and S180 compatibility: All three models share the same battery bay dimensions, connector pinout, and BMS handshake protocol — 53.05 × 38.50 × 4.80mm with a matched 3.7V voltage rail. No adapters or modifications needed.
• Bench tested on actual hardware: We cycled this cell through full charge and load discharge on the bench. The BMS held cutoff correctly at low voltage, and charge acceptance was consistent across three consecutive cycles with no thermal flags.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before it reports accurate percentages to the OS.

Why the BLU HERO reports wrong battery percentage after a cell swap

The fuel gauge IC in the HERO stores a learned discharge curve from the original cell. When a new cell goes in, that stored curve no longer matches the actual voltage-to-capacity relationship of the replacement. The OS reads the fuel gauge register, not the raw cell voltage, so it displays percentages calibrated to a cell that no longer exists. One full discharge to automatic cutoff followed by an uninterrupted charge to 100% forces the IC to rewrite its reference curve. After that cycle, percentage reporting stabilises.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem or display pulls a current spike the cell cannot sustain at its current state of charge — voltage drops below the BMS cutoff threshold even though the fuel gauge still shows charge remaining. On a freshly installed cell, the fuel gauge IC has not yet profiled the new cell's internal resistance, so it underestimates how close the cell is to its voltage floor. Run one full discharge cycle without interruption. After recalibration, the gauge will report low battery earlier, giving the OS time to throttle load before the BMS trips at 3.0V.