Run pod battery life

I’ve had more than a few runs frustrated by my Zwift foot pod. Although Zwift recognizes my pod, when I go to run, my avatar doesn’t move, nor am I able to calibrate my treadmill, etc. I changed my battery three days ago and was able to use it per normal right after. 3 days later, I’m back to the same issue. I don’t recall my battery lasting less than a week when I first bought the pod last year. Ugh.