Kyocera Torque G04 Replacement Battery KYV46UAA 3.8V 2900mAh

Kyocera Torque G04 / KYV46 — 3.8V Li-ion Replacement Battery (KYV46UAA)

This is a 3.8V, 2900mAh (11.02Wh) Li-ion cell built to replace the OEM battery in the Kyocera Torque G04 and KYV46 smartphones. The Torque G04 is a rugged Android handset used in outdoor and industrial environments where the original battery takes heavy daily abuse. Swap this cell when the original no longer holds a usable charge under normal screen and modem load.

• Torque G04 and KYV46 fitment: Both model designations — the carrier variant KYV46 and the Torque G04 name — use the same battery bay geometry, connector pinout, and BMS handshake. One cell covers both.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on compatible hardware. The BMS accepted the cell without fault flags, and charge termination triggered correctly at full capacity.
• Fuel gauge recalibration on first use: On first installation, disable fast charging and run one full discharge-to-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated coulomb counter.

Sudden shutdown at 20–30% on the Torque G04 after a cell swap

This happens when the fuel gauge IC is still calibrated to the old cell's voltage curve. The Torque G04's modem and display draw peak current during active use, and a new cell with a slightly different internal resistance profile can hit a voltage sag the gauge reads as a safe 25% — then collapse instantly. The fix is one full uninterrupted discharge to automatic shutdown, followed by a full charge without interruption. After that cycle, the coulomb counter realigns to the new cell and percentage reporting stabilises.

Device not powering on after the replacement battery sat in storage

Li-ion cells self-discharge during storage, and if the cell dropped below 2.5V per cell, the BMS enters lockout to prevent reverse-polarity damage to the cell. The Torque G04 will show no response to the power button in this state. Connect the phone to a wall charger — not a PC USB port — and leave it for 15–20 minutes without pressing anything. The charge IC will trickle current into the cell until voltage climbs above the BMS recovery threshold, typically around 2.9V, at which point normal charging resumes.