Buy 1-cell 3.7V lithium-ion batteries online in India at Zbotic. Our single-cell Li-Ion battery packs deliver 3.7V nominal voltage (4.2V fully charged) and are available in various capacities. Ideal for powering Arduino projects, ESP32/ESP8266 IoT devices, wearable electronics, portable instruments, and other low-voltage applications. Quality cells with reliable cycle life and consistent discharge performance.