This product worked great for our Power Wheels Jeeps for a few weeks and then suddenly stopped working properly. Instead of a light bulb during charging, both of them began to blink slowly, like New Year's garlands. I contacted the company for advice and then "opened a case" to return the goods. A few weeks later my return is still being processed but no response from the company. Of course, while I'm waiting, my Revain return window has expired. Lesson learned: Don't contact the seller, return directly through Revain.