Teleradio TG-TXMNL Crane Remote Replacement Battery 3.7V 2400mAh

Teleradio TG-TXMNL Transmitter — 3.7V Li-ion Replacement Battery (D00004-02)

This 3.7V, 2400mAh Li-ion cell replaces the original battery in the Teleradio TG-TXMNL handheld transmitter. The TG-TXMNL is a crane remote control unit used in industrial lifting and hoist operations. Physical dimensions are 68.40 × 42.20 × 14.80mm — verify against your existing cell before ordering.

• TG-TXMNL transmitter fit: The TG-TXMNL uses a single Li-ion cell at 3.7V nominal. This replacement matches that voltage rail and connector orientation, and the BMS in the transmitter handshakes with the cell's protection circuit on power-up. OEM cross-references include D00004-02, 22.381.2, M245060, and D4-02.
• Bench tested on actual hardware: We cycled this cell through repeated charge and discharge sequences on the bench. The onboard BMS triggered protection cutoff correctly at low-voltage thresholds, and the transmitter's power-on handshake completed without fault codes on each cycle.
• Infrequent-use storage charge: If the TG-TXMNL sits unused for more than four weeks, connect it to the charger for at least 30 minutes before relying on it. Li-ion cells discharged below 2.5V enter BMS lockout — the charger will appear to do nothing, and the remote will not power on.

Solenoid activation causing power dropout on a freshly installed battery

When the TG-TXMNL sends a solenoid or relay command to the crane, the transmitter draws a short inrush current spike. If the replacement cell has a low-rated continuous discharge current or its BMS threshold is set conservatively, that spike can trip the protection circuit and cut power mid-operation. This shows as the remote going dark immediately after a control activation — not a dead battery, but a BMS trip. The fix is to ensure the replacement cell's discharge rating covers the transmitter's peak draw. This cell's BMS is rated to handle the TG-TXMNL's activation load without nuisance tripping under normal operating conditions.

Remote showing low battery immediately after swapping in a new cell

A new Li-ion cell ships at storage voltage — typically 3.6V to 3.75V, not a full 4.2V charge. The TG-TXMNL reads cell voltage and flags low battery when it sees anything below its internal threshold, which can sit above storage voltage on some firmware versions. This is not a faulty cell. Connect the battery to the transmitter's charger and run a full charge cycle before first use. Once the cell reaches 4.2V, the low-battery indicator will clear.