Battery performance over time
The rechargeable battery in your PitPat GPS Tracker is sealed inside to help make your PitPat small and waterproof. That means that neither you nor we can replace it.
You should have a long life together, but like all rechargeables, the capacity of your PitPat's battery will eventually start to reduce as it ages. When that happens, you may like to consider buying a replacement device to return to full performance.