PowerBoost1A is a DC/DC boost converter module with voltage
5 V DC output and the function of charging a LiPoly/
LiIon. The PowerBoost1A enables low battery detection,
the maximum output current is 2A and the conversion frequency is
700KHz.  The low battery LED indicator lights up red when
voltage drops below 3.2V, optimized for the most common use of
batteries. Operating efficiency of more than 90% in most
cases and low quiescent current: 5mA when enabled and the
power supply is on, 20uA when disabled (the LED of
power supply and low battery are off).