Hi,
I’m trying to solve a severe battery drain issue on my Forerunner 945 (non-LTE).
The watch had not been connected to Garmin Connect for approximately one year. Battery life was still normal before reconnecting it.
After connecting it to Garmin Connect again, the watch updated to software 13.70. From that same day onwards, the battery suddenly drains from fully charged to empty in approximately 2 hours, even when no activity is running.
I have already tried:
- Full factory reset – no improvement
- Hard reboot – no improvement
- Standard Garmin watch face
- Disabling phone/Bluetooth, Wi-Fi and other unnecessary functions
Current versions:
- Software: 13.70
- GPS: 6.60
- Wi-Fi: 4.01
- CIQ: 3.3.6
- BMX: 5.1.0
- WHR: 5.01.00
- ANT/BLE/BT: 6.15
- Sensor Hub: 22.40
The timing makes me suspect the 13.70 update and/or Sensor Hub 22.40, rather than the battery suddenly failing at exactly the same moment.
I would therefore like to test a downgrade before replacing the watch or battery.
Does anyone still have a complete, known-good firmware/downgrade package for the regular Forerunner 945? Ideally 13.60, but another stable pre-13.70 version would also be useful, particularly if it includes the appropriate Sensor Hub/RemoteSW files.
I’m specifically looking for the Forerunner 945 non-LTE (A03525), not the 945 LTE.
Has anyone experienced the same extreme drain after 13.70/22.40, and did downgrading solve it?
Thanks!