Lithium ion Polymer (Lipo) Battery is employed with polymer electrolyte and is packed with Aluminum plastic film. Li-polymer batteries offer several advantages. Firstly, it has a great energy density in terms of weight. Secondly, Lipo battery is more flexible in cell sizes and shape. Finally, it is of higher safety, and with superior stability in over-voltage and high temperature conditions. Principle and Reactions: When a lithium-based cell is charging, the lithium is extracted from the anode and inserted into the cathode. When the cell is discharging, the reverse occurs. Positive reaction: LiCoO2 Li1-xCoO2 + xLi+ + xe- Negative reaction: xLi+ + xe- + 6C LixC6 Total reaction: LiCoO2 + 6C Li1-xCoO2 + LixC6