How to Charge 7.4v Li-Ion Battery Pack with CCCV

For one of my project i need to use 7.4V Li-ion battery of 2200mAh, Now i need to charge this battery pack efficiently. I'm searching for a charging circuit for the same but what ever i'm getting is a 3.7v charger or a charger not following CCCV methord. as mentioned in following link


Please suggest me a way to charge and discharge my battery in a better way.