Shopped Acer recertified because it was one of the few places I could find this product in stock. It was processed and shipped fairly quickly. However, upon receipt, I found that the stylus already had the AAAA battery installed. The battery had corroded and was leaking fluid and material inside of the stylus. I replaced the battery and cleaned what I could. As of now, the stylus is working. If that changes, I will update the review.