Tested and confirmed to work on the original Famicom. There were no issues found, but please be aware that it may not function correctly depending on your console's environment. There is no guarantee for the remaining battery life of games with backup batteries. Please understand that these items are stored at home and have been inspected by a non-professional. Please refrain from price negotiations. Recycled materials may be used for packaging. In the unlikely event that there is a problem with the purchased item, please contact us before leaving a review. We will address the issue. #TaraoDo_FC