This module is excellent for charging mobile phones or powering other kinds of devices from 3V power sources such as Lithium Ion batteries or AA batteries. It delivers a regulated 5V output from a 3V input source.

Features:

•     Input voltage: 1-5V
•     Output voltage: 5.1-5 .2 V
•     Output Current: Rated 1A-1.5A (single lithium input), the maximum 1.5A (single lithium input)
•     Efficiency: Up to 96% (the higher the input voltage, the higher the efficiency)
•     Switching frequency: 500KHz
•     Input Reverse Polarity Protection: None
•     Connection: Welding
•     Input: IN + Postive, IN-Negative
•     Output: USB Output

Can be used to easily make mobile power supply to charge and power MP3, Mobile phones or power bank from as little as a single cell.