This is a very small, extremely light weight battery based on Lithium Ion (Lipo) chemistry. The Lipo battery is rated at 3.7V 200mAh.
It measure 20 x 17 x 4mm and weighs only 5g. The cable is terminated with a 2pin JST-PH (2mm) connector
Bluetooth 4.0 Module 2-3.3V
This Bluetooth 4.0 Module which is a nRF51822 Bluetooth® Smart Beacon that lets you explore the full range of development possibilities for beacons using Bluetooth Smart t..