Definition: Given an Amazon customer review, write a title for the review. The preferred titles are under fifteen words.
Input: I installed this replacement battery in my Kindle DX a month ago, because the original battery would no longer hold a charge for longer than a day or two. So far, so good. Installation was a bit more difficult than I anticipated from watching the online video instructions. It was very difficult to remove the lower cover, and I destroyed the green plastic tool that was provided to assist that process. I ended up using a small metal screwdriver instead. Battery works great, and it's wonderful to have my Kindle's long battery life back!

Battery great, but not the plastic tool