This is a small power supply to be used with a LilyPad Arduino. This board has a JST connector, which will connect to JST terminated single cell LiPo batteries. It also has terminals for charging the LiPo battery a LiPo chargers.
LilyPad is a wearable e-textile technology developed by Leah Buechley and cooperatively designed by Leah and SparkFun. Each LilyPad was creatively designed to have large connecting pads to allow them to be sewn into clothing. Various input, output, power, and sensor boards are available. They're even washable - but be sure to remove the battery!
Note: A portion of this sale is given back to Dr. Leah Buechley for continued development and education of e-textiles.