Ms. Wu has a Gtech little green cleaning machine, and the battery is just out of the warranty, and the heating issue has arisen. When she wanted to purchase the new one, she incidentally found us at FB, then decided to give it a shot and see how far it could go. She never expected that our professional techniques save it alive, and it not only gave it a new life but also prolonged the efficiency of the battery. She keeps appraising the result.