I had issues as well and reached out to their support they provided me with detailed graphs of the battery usage over time and when the cat was in the wifi zone where it does seem to turn off the gps as well as mobile network to safe energy.

I adjusted my wifi to cover a bit more of my garden area and since then battery life has increased to 2-3 days.

We're using Tractive with our dog and regularly get a full week. And that includes 2-3 walks per day that are outside of the wifi zone.