This is the type of module that could be used in a power bank to control the charging of a single cell lithium battery (usually 18650 size). It also offers protection from overcharging and over-discharging. This module also has an integrated power meter and regulated 5V 2.1A output.
This module is also suitable for supply power to an Arduino, directly since the output is a regulated 5V. The 5V output matches the input requirement of most USB powered applications like Raspberry Pi.
- VIN – 4.5-5.5V
- Battery – Lithium Ion
- Output – 5V 2.1A
5 x 18650 Lithium Battery Charge/Discharge/Protection Module