About this replacement
Garmin gWind Wireless Series — 2.4V Ni-MH Replacement Battery (361-00075-00)
This is a 2.4V, 700mAh Ni-MH cell that replaces the original battery in the Garmin gWind Wireless and gWind Wireless Transducer wind sensor units. It fits the transmitter module that sends real-time wind speed and direction data to compatible Garmin chartplotters. Voltage and capacity match OEM spec exactly — no modification required.
- gWind Wireless and Transducer compatibility: Both the standard gWind Wireless (010-01248-00) and the Transducer variant share the same battery housing, connector, and BMS handshake. One cell covers both units.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the gWind platform. The BMS accepted the cell without error, completed a full charge cycle, and the unit resumed normal transmission to the chartplotter.
- Cold-start satellite acquisition after swap: After fitting this cell, power the unit on and allow the connected chartplotter to re-acquire the wind sensor signal before heading out. A full power interruption resets the sensor link — allow 5–10 minutes for the chartplotter to re-establish data from the transmitter on first power-up.
Why the gWind Wireless drops off the chartplotter display at low charge
Ni-MH cells lose voltage gradually as capacity depletes, but the gWind transmitter has a hard cutoff threshold — typically around 2.0V under load. Below that, the unit stops transmitting before the battery reads visually "dead." The chartplotter shows no wind data, not a low-battery warning. This is a transmitter-side cutoff, not a chartplotter fault. Fitting a fresh cell and cycling power restores transmission immediately.
Wind data frozen on chartplotter after battery replacement
After a full power interruption, the gWind transmitter and chartplotter must re-pair over the 2.4GHz ANT wireless link. The chartplotter may show the last known wind reading as frozen rather than blank. Go to the chartplotter's sensor settings and trigger a fresh device scan. Once the transmitter is re-detected, live wind data resumes — confirm the reading is updating by watching for direction changes over 30 seconds.