This is a very small, extremely light weight batty based on the new Polymer Lithium Ion chemistry. This is the highest energy density currently in production. Each cells outputs a nominal 3.7V at 100mAh! Comes terminated with a standard 2-pin JST connector - 2mm spacing between pins. These batteries require special charging. Do not attempt to charge these with anything but a specialized Lithium Polymer charger.
Battery includes built-in protection against over voltage, over current, and minimum voltage

Features:
  - 2C continuous discharge - very high for low price
  - Excellent long-term self-discharge rates (<8% per month)
  - Robust power source under extreme conditions (-25 to 60C)
  - Dimensions: 0.19x0.52x1.19" (4.7x13x28mm)
  - Weight: about 3g - Our scale doesn't go this low