BLU Rave C634104130T Replacement Battery 3.7V 1500mAh

BLU Rave — 3.7V Li-ion Replacement Battery (C634104130T)

This is a 3.7V, 1500mAh Li-ion cell built to fit the BLU Rave smartphone. It replaces OEM part number C634104130T directly. The Rave is a compact Android handset, and this cell restores its calling, messaging, and app functions when the original cell has degraded past usable capacity.

• BLU Rave fit: The Rave uses a proprietary cell footprint measuring 65.23 × 41.98 × 5.21mm with a three-pin connector that carries charge data to the phone's fuel gauge IC. This cell matches that connector and physical envelope exactly.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the BLU Rave platform. The BMS accepted the charge handshake without fault codes, and the fuel gauge IC tracked state-of-charge across the full voltage window from 4.2V down to the 3.0V cutoff.
• First-cycle calibration on the Rave: After fitting this cell, disable fast charging in the Rave's settings and run one complete discharge-to-charge cycle at standard rate. This gives the fuel gauge IC a clean baseline against the new cell's discharge curve before high-current charging begins.

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

The Rave's fuel gauge IC stores a learned discharge curve from the original cell. When you fit a new cell, that stored curve no longer matches the new cell's actual voltage-to-capacity relationship. The IC may report 50% when the real state of charge is closer to 30%, or jump erratically as it tries to reconcile the mismatch. One full discharge down to automatic shutdown, followed by a complete charge to 100%, forces the coulomb counter to reset and relearn against the new cell.

Sudden shutdown at 20–30% remaining on the BLU Rave

This is a voltage cliff failure, not a capacity failure. Under modem transmission or screen-on load, the cell voltage drops sharply below the threshold the Rave's protection circuit tolerates — even though the fuel gauge still shows charge remaining. A degraded or deeply discharged replacement cell has elevated internal resistance that accelerates this voltage sag under load. If this happens, charge the cell uninterrupted to 4.2V and confirm the phone holds stable voltage above 3.6V during an active call before assuming the cell is faulty.