Sharp V402SH SHBV01 Replacement Battery 3.7V 700mAh

Sharp V402SH — 3.7V Li-ion Replacement Battery (SHBV01)

This is a 3.7V, 700mAh Li-ion replacement cell for the Sharp V402SH smartphone. It fits the V402SH directly, using OEM part number SHBV01. Install it when the original cell no longer holds a usable charge or fails to power the handset at all.

• V402SH platform fit: The V402SH uses a fixed connector and BMS handshake tied to the SHBV01 cell specification. This replacement matches that voltage rail and connector footprint exactly — the phone's charge IC accepts it without throwing a battery authentication error.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the bench. The BMS held charge cutoff cleanly at 4.2V and low-voltage cutoff engaged before the cell dropped below safe floor — no premature shutdowns during the discharge run.
• First-cycle fuel gauge reset on the V402SH: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. The V402SH fuel gauge IC recalibrates against the new cell's discharge curve during this cycle. Skipping it means the phone reads percentage from the old curve — expect jumpy or inaccurate readings until calibration completes.

Sudden shutdown at 20–30% on the V402SH after cell swap

The V402SH shuts down mid-use even though the status bar shows charge remaining. This happens because the fuel gauge IC is still calibrated to the old cell's voltage curve. A fresh cell has a steeper voltage drop under modem or screen load than the worn original — the phone hits its low-voltage cutoff before the percentage reaches zero. Run one full discharge cycle without fast charging. After that cycle, the coulomb counter resets its reference and the reported percentage aligns with actual cell voltage.

Battery percentage jumping erratically on the V402SH

After fitting a replacement cell, some users see the percentage skip — jumping from 60% to 40% or climbing without charging. The fuel gauge IC stored learned data from the degraded original cell and applies it to the new one. The fix is a full uninterrupted discharge down to automatic shutdown, then a full charge to 100% without interruption. One complete cycle rewrites the IC's reference table. After that, readings stabilise at accurate values.