About this replacement
Rode Wireless Go II — 3.8V Li-Polymer Replacement Battery (NTA552331)
This is a 3.8V, 380mAh Li-Polymer cell that fits the Rode Wireless Go II transmitter unit. It replaces OEM part numbers NTA552331 and 0442-0053-01. The Wireless Go II is a compact clip-on wireless microphone transmitter used by videographers and content creators.
- Wireless Go II transmitter fit: The transmitter draws from a single small Li-Polymer cell at 3.8V. This replacement matches that voltage rail and the physical footprint — 27.70 × 23.00 × 6.20mm — so the cell seats correctly without stressing the flex connector.
- Bench tested on actual hardware: We ran this cell through charge and audio-transmission cycles on the Wireless Go II. The BMS held cutoff cleanly at the low-voltage threshold and accepted charge from both USB-C and the dual-charging case without triggering a fault state.
- First-cycle conditioning on the Wireless Go II: After fitting the new cell, run a full charge via the dual-charging case before using the transmitter in a shoot. The Wireless Go II's onboard BMS needs one complete charge cycle to log the new cell capacity before the battery indicator reads accurately.
Why the Wireless Go II transmitter cuts out mid-recording on a new battery
The Wireless Go II draws simultaneously from the audio codec and the 2.4GHz radio. That combined load on a cell sitting at storage voltage — typically around 3.6–3.7V after months on a shelf — can trip the BMS undervoltage cutoff before the indicator shows low. The fix is not complicated: put the transmitter on a full charge before the first use. One complete charge cycle brings the cell to 4.2V and lets the BMS re-calibrate its cutoff window to actual cell capacity.
Wireless Go II battery indicator shows full but transmitter dies early in a session
This happens when the cell ships at storage voltage and the indicator hasn't been calibrated to the new cell. The fuel gauge in the Wireless Go II reads percentage based on voltage curves it learned from the old cell. After fitting the replacement, charge fully to 4.2V and then run the transmitter to near-empty once. That single discharge-and-charge cycle resets the curve, and the indicator will track correctly from the second cycle onward.