[OBSOLETE] Ecolink Wireless Light Switch Retrofit (TLS-ZWAVE5)

I also purchased this switch from Amazon. It works perfectly for my gas fireplace switch. It is powered by AA batteries X 2. But in my ST app, it says batteries are “0% battery remaining” from the day I installed it. However, it works fine. Anyone else have this problem?

Can anyone confirm if this device is working with the new V3 app?