In small battery-powered setups, even slight voltage changes can affect performance and reliability. With the Analog Add-on, The Pill by Shelly connects to your voltage sensors and gives you accurate real-time readings - whether it’s 3.7V, 4.2V, 12V, 24V, or other low-voltage sources. The moment levels shift, data reaches your Shelly Smart Control app, helping you react before power issues occur. Keep your batteries, UPS units, and backup systems stable and running longer.