Max battery time

I use a cheap chinese unbranded powerbank and it works ok, but I've heard that some powerbanks do not turn on unless a device starts drawing current exceeding a certain threshold, and sometimes garmin watches do not exceed that threshold.

This is absolutely true. Some of them suck for the Fenix and the StrydLive.

Actually the last version of the GPS 2.24 doesn't zig or zag using ultra track. I was amazed by the quality of my tracks since the update.

I have the same gps , but show me zigzag when I walk 11minutes per km . Maybe this is the reason . not run fast but walk slow show zigzag

How about carrying multiple watches? I have a 3HR, a 5X and a 5xPlus. Combining them should be enough...

I do have an old 3 hr. And a vivo sport. But I just want one. I try to buy a cheap powerbank, and charge it sometimes. Does not need many mAh.