TAV
Guru
- Location
- mountainash
I've bought a garmin etrex 35t for my gravel bike it takes 2 aa batteries but they don't last that long I was hoping to do a audax next year and was hoping to use this gps I was just wondering could I use the USB connection on the etrex to power it with a power bank and use the batteries as back up. Could I use the etrex in the rain with the USB connected to the power bank .