Already have green strip.
Need 9 cells amazon, 5 bucks for 2 cells
http://www.18650batterystore.com/ProductDetails.asp?ProductCode=SAMSUNG-25R-18650&click=2&gclid=CjwKCAiApo3SBRA4EiwAty8i-isB-7sWhaY2Hx6HDraiwKyhL6-XJai3OQn68Q1Y14nZC7ZCAGxT5RoCx3IQAvD_BwE
Need 2 controllers, 1 to use, one to experiment with.
Icstation 12V 30A 3S Lithium Battery Protection PCB BMS Board for 18650