BLU Studio 5.0 D530 Compatible Battery 3.7V 2000mAh

BLU Studio 5.0 / D530 Series — 3.7V Li-ion Replacement Battery (C706045200T)

This is a 3.7V, 2000mAh Li-ion battery for the BLU Studio 5.0, D530, D530X, and D530e smartphones. It replaces OEM part numbers C706045200T and C706045200P. Fit this battery when the original cell no longer holds a charge, swells, or fails to accept current.

• Studio 5.0 and D530 variant compatibility: The D530, D530X, and D530e share the same battery bay dimensions and connector pinout as the Studio 5.0. All variants run on the same 3.7V rail with identical BMS handshake logic, so one cell covers the full model range listed.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a D530 platform. The BMS accepted the new cell on first connection, charge current stepped down correctly at top-of-charge, and no cutoff faults triggered during the discharge curve.
• Fuel gauge recalibration on first use: After installation, disable fast charging and complete one full discharge-charge cycle before resuming normal use. 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 BLU Studio 5.0 after a cell swap

This happens when the fuel gauge IC is still calibrated to the old cell's voltage-capacity curve. As the phone pulls load current from the modem or display, terminal voltage drops faster than the gauge expects. The BMS reads that voltage drop as a hard undervoltage event and cuts power before the percentage indicator reaches zero. One complete discharge down to auto-shutoff followed by a full charge resets the coulomb counter and eliminates most premature cutoffs.

Phone not powering on after the replacement battery sat in storage

Li-ion cells self-discharge in storage. If the cell voltage drops below approximately 2.5V per cell, the BMS enters a lockout state and blocks normal charge current to prevent thermal runaway on a deeply discharged cell. The phone will show no response on the charger. Connect the device to a wall adapter — not a computer USB port — and leave it for 20–30 minutes without pressing the power button. The charge IC applies a low trickle current to recover the cell voltage back above the BMS re-enable threshold of around 3.0V, after which normal charging resumes.