Instructions: In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.
Input: It worked great for almost a year and then it stopped charging in portrait mode. No big deal, although, inconvenient I just started using it to charge my phone in the landscape position. Now it only charges my new S9 intermittently. Its just enough to keep it at its current charge level.
Output:
Used to work great... but functionality keeps dropping off