SEO Strategy for a custom made battery service

This will be a monthly project with some settings at the beginning and a certain amounts of backlinks each months : The keywords have already been decided. We have a lot of customers who wants a very low alternative to upgrase their SEO. They are aware that it will not put them in front page but they don't want to do nothing. If this project is a success, we have at least 3 other projects of the same type and you will become our SEO Expert.