Gigabyte Gsmart Rio R1 SRB-01 Compatible Battery 3.7V 1500mAh

Gigabyte Gsmart Rio R1 — 3.7V Li-ion Replacement Battery (SRB-01)

This is a 3.7V, 1500mAh Li-ion battery for the Gigabyte Gsmart Rio R1 smartphone. It replaces part number SRB-01 and restores power to the phone's processor, display, and cellular radio. Dimensions are 59.10 × 45.90 × 4.90mm — verify your bay before fitting.

• Gsmart Rio R1 fitment: The SRB-01 cell is specific to the Rio R1's battery bay geometry and connector orientation. The phone's power management IC expects a 3.7V nominal cell — substituting a different voltage rail triggers undervoltage shutdowns at the PMIC level.
• Bench tested on actual hardware: We cycled this cell through full discharge and charge passes on the bench. The BMS held within the expected 3.7V nominal window, and cutoff voltage triggered correctly at the low end without locking the protection circuit.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle before returning to normal use. This lets the fuel gauge IC map the new cell's discharge curve before the charge controller pushes current into an uncalibrated cell — skipping this step causes erratic percentage readings for several days.

Sudden shutdown at 20–30% on the Gsmart Rio R1 after a cell swap

This is a voltage cliff problem, not a capacity problem. Under peak modem load or screen brightness, the new cell's internal resistance causes a sharper voltage drop than the fuel gauge IC expects from its stored curve. The PMIC reads the sag as a critically low voltage and cuts power to protect the circuit — even though the reported percentage looks safe. Run two full discharge-charge cycles without interruption and the fuel gauge will recalibrate its cutoff threshold to match the new cell's actual discharge curve.

OS battery percentage jumping or reading 0% immediately after installation

The Gsmart Rio R1's fuel gauge IC stores a learned discharge curve from the old cell. A new cell with different impedance characteristics makes those stored values inaccurate, so the reported percentage jumps or bottoms out instantly. This is a calibration mismatch — not a faulty battery. Charge the phone to 100%, let it discharge fully until shutdown, then charge uninterrupted back to 100%. After that single full cycle, the coulomb counter resets against the new cell and percentage readings stabilise.