PowerBoost 500 Charger - Rechargeable 5V Lipo USB Boost @ 500mA+ breadboard jumper wires and a built in sleep/off

and a built in sleep/off mode

including an "OFF" pin to turn off the board and a "VRTC" pin to keep the internal Real-Time Clock powered and running

The RTC offers battery backup functionality with a coin cell (CR1220)

Wireless Range: Up to +4dBm output power

5mm stereo audio jack

PowerBoost 500 Charger - Rechargeable 5V Lipo USB Boost @ 500mA+ breadboard jumper wires and a built in sleep/offThe PowerBoost 500C is the perfect power supply for your portable projects, providing a convenient and efficient solution for powering your electronics on the go. It includes a built in battery charger circuit, allowing you to recharge the battery while keeping your project running. This DC DC boost converter module can be powered by any 3. 7V LiIon or LiPoly battery, and converts the battery output to 5. 2V DC, making it ideal for powering 5V