BLU Studio G2 Plus C755843220L Replacement Battery 3.7V 1300mAh

BLU Studio G2 Plus — 3.7V Li-ion Replacement Battery (C755843220L)

This is a 3.7V, 1300mAh Li-ion replacement battery for the BLU Studio G2 Plus and compatible models. It fits the S010Q, Studio G HD LTE, and S0250UU using OEM part number C755843220L. Install it when the original cell no longer holds charge or the phone shuts down unexpectedly before reaching 0%.

• Studio G2 Plus and S010Q compatibility: These models share the same battery bay dimensions, connector pinout, and charge IC voltage rails — 70.60 x 57.86 x 4.06mm. A single cell covers all four fit models without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Studio G2 Plus platform. The BMS accepted handshake on the first cycle and the charge IC reached 4.2V cutoff without interruption.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one full discharge-to-charge cycle. This lets the fuel gauge IC map its coulomb counter against the new cell's discharge curve before high-current charging pushes current into an uncalibrated state.

Why the Studio G2 Plus reports wrong battery percentage after a cell swap

The fuel gauge IC on the Studio G2 Plus stores a learned discharge curve from the previous cell. When a new cell goes in, that stored curve no longer matches the actual cell chemistry, so the IC reports inaccurate percentages. The phone may show 40% and then jump to 15% without warning. One full discharge-charge cycle without interruption forces the IC to relearn the new cell's voltage-to-capacity relationship and restore accurate readings.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem radio or screen load pulls current fast enough to cause a brief voltage sag below the BMS cutoff threshold — even though the displayed percentage looks safe. The old fuel gauge calibration makes this worse because the IC underestimates how close the cell is to its low-voltage floor. The fix is the same recalibration cycle: drain the phone to auto-shutdown, charge uninterrupted to 100%, and repeat once. After two full cycles, the coulomb counter tracks the new cell accurately and the premature shutdowns stop.