Rode LB-1 Performer TX-M2 Replacement Battery 3.7V 1300mAh

Rode Performer TX-M2 / VideoMic Pro+ — 3.7V Li-ion Replacement Battery (LB-1)

This is a 3.7V, 1300mAh (4.81Wh) Li-ion replacement cell for the Rode Performer TX-M2 wireless microphone transmitter and the VideoMic Pro+ camera-mount microphone. Both devices use the same LB-1 cell format and connector. When the original battery degrades, audio transmission becomes unstable before it fails completely.

• TX-M2 and VideoMic Pro+ cell compatibility: Both units draw from the same 3.7V nominal rail and use an identical LB-1 cell footprint with the same connector pinout. The BMS in each device reads cell voltage and temperature — a cell that doesn't match the expected charge curve will trigger early low-battery warnings.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the TX-M2 transmitter. The BMS accepted the cell without fault flags, reached full charge voltage at 4.2V, and the transmitter maintained stable RF output through the full discharge cycle without dropout.
• TX-M2 transmitter storage tip: If the transmitter sits unused for several weeks, the BMS may lock the cell out at startup due to voltage dropping below the reinitialisation threshold. Plug the transmitter into USB-C charge for at least 15 minutes before attempting to power on — this wakes the BMS before the cell voltage climbs back into normal operating range.

Why the TX-M2 shows full battery then cuts out mid-performance

A degraded LB-1 cell holds its open-circuit voltage near 3.7V at rest, so the transmitter displays a full or near-full indicator. Under the sustained RF transmit draw of a live performance, internal cell resistance causes voltage to sag rapidly. The TX-M2 BMS reads this sag as a low-cell condition and shuts the transmitter down to protect the cell — even though the indicator showed green moments earlier. Replacing the cell is the fix; a resting voltage check alone will not reveal the problem.

Receiver losing RF lock on the TX-M2 after a battery swap

After fitting a new LB-1 cell and powering the TX-M2 back on, the receiver may show an unlinked or searching status. This happens because the transmitter re-initialises its RF output from scratch on a fresh power cycle, and the receiver does not always reacquire automatically. Hold the TX-M2 power button until the transmitter LED stabilises, then perform a rescan or channel lock from the receiver end. The link should re-establish once the transmitter is outputting a stable RF signal at the paired frequency.