This is a miniature power supply with built-in Li-Ion charger for WiFi WebRadio.
It is based on LTC3440 chip. A Micropower Synchronous Buck-Boost DC/DC Converter.
- Voltage input 2,7V to 4,2V
- Voltage output 3,3V at 600mA
- Low battery LED indicator at 3V or less
- Li-Ion charger at 4,2V / 500mA