Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Does it work good on a Xbox 360 Wireless Controller?

It does a decent job. The only problem is, when i fully charge this batteries and insert them to my controller, the controller shows that the power is 3/5. That's the only reason i gave it 4 stars instead of 5. But overall, the product is much cheaper then outside stores, as in Radio shack they where $20.