Stageclix Jack V2 Transmitter 2.4V Ni-MH Replacement Battery

Stageclix Jack V2 Transmitter — 2.4V Ni-MH Replacement Battery (399459)

This 2.4V, 700mAh Ni-MH cell replaces the original battery in the Stageclix Jack V2 Transmitter. The Jack V2 is a compact wireless audio transmitter used in stage and performance environments. It slots directly into the transmitter housing and uses the same voltage rail as the factory cell.

• Jack V2 Transmitter fit: The Jack V2 runs a 2.4V two-cell Ni-MH configuration. The voltage rail, connector orientation, and physical footprint all match the OEM cell. No adapter or modification needed.
• Bench tested on actual hardware: We ran this cell under a combined audio signal and DECT radio load. The BMS held voltage without dropping into cutoff, and the transmitter maintained a stable output signal throughout the test cycle.
• First-cycle base station pairing: On first use, place the transmitter in its charging dock and complete a full charge cycle before transmitting audio. The base station logs the new cell during this cycle and won't display an accurate charge level until it finishes.

Base station showing a charging error after fitting the new cell

The Jack V2 base station handshakes with the transmitter cell during the first charge. If the cell arrives at storage voltage — typically around 2.2V — the base may flag a charge error or refuse to begin charging. This happens because the BMS hasn't completed its initialisation with the new pack. Remove the transmitter, reseat it firmly, and leave it on the dock for a full uninterrupted charge cycle. Once the base reaches 2.4V on the cell, the error clears.

Transmitter cutting out mid-performance on a new battery

Cutouts during use are almost always voltage sag under combined load — the DECT radio and audio circuit draw simultaneously, which pulls the cell voltage below the transmitter's cutoff threshold. Ni-MH cells are particularly prone to this in the first few cycles before internal resistance settles. Run three to five full charge and discharge cycles to allow the cell to stabilise. After conditioning, check that the transmitter reads at least 2.4V on a full charge before a performance.