This BMS is designed to power a 3.3V or lower voltage circuit operate off a 3.7v single-cell Li-Ion battery. Primary application is IoT.
It features micro-USB charging, has options for a custom regulator, and you can communicate through it with serial and i2c.
It monitors battery capacity, health, and charge cycles.
It also regulates the charging (don't want the battery to blow up) when you plug it into a USB port.
Low-Power BMS