GSmart Guru G1 HD336283PLV Replacement Battery 3.8V 2500mAh

GSmart Guru G1 — 3.8V Li-Polymer Replacement Battery (HD336283PLV)

This is a 3.8V, 2500mAh Li-Polymer replacement battery for the GSmart Guru G1 smartphone. It uses OEM part number HD336283PLV and fits the Guru G1 directly. Voltage and capacity match the original cell specification.

• Guru G1 fitment: The Guru G1 uses a single-cell Li-Polymer pack rated at 3.8V nominal. The HD336283PLV connector pinout carries both the charge line and the thermistor signal the phone's charge IC reads during every charge cycle. A mismatched pack at a different nominal voltage will trigger a charge fault — this cell is matched to that 3.8V rail.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a Guru G1 unit. The BMS accepted the charge handshake on the first connection, current ramped to CC phase without a fault flag, and the thermistor line reported within the expected temperature window throughout the cycle.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one full discharge-to-charge cycle at standard rate. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before the phone starts making load decisions based on that data.

Why the Guru G1 reports wrong battery percentage after a cell swap

The Guru G1 uses a fuel gauge IC that builds a discharge model from accumulated charge and voltage data on the installed cell. When you swap to a new cell, the IC still holds the old cell's curve in memory. It will map the new cell's voltage to the wrong capacity estimate — often reading 30% when the cell is nearly flat, or showing 100% well before a full charge completes. One complete discharge below 5% followed by a full charge at standard rate forces the IC to re-anchor its coulomb counter to the new cell. After that cycle, percentage reporting stabilises.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops sharply under modem or display load — a voltage cliff the fuel gauge IC did not predict because it hasn't finished recalibrating. The phone's protection circuit reads the sag as an undervoltage event and cuts power before the percentage reaches zero. It is not a faulty cell. Run the phone down to automatic shutdown once, charge fully without interruption, and check that the cell reaches 4.35V at end of charge — if it does, the cliff behaviour will reduce after the second full cycle.