How do you replace the battery? We have some from Feb 2016 - I'm assuming they still work but if not.I assume you mean Feb 2017, not Feb 2014, but yes, you can still use it.The only issue would be the battery, but even that is only an issue for long-range functions like ride photos. For things where you touch it to something - park entry, hotel room entry, FP use - the battery isn't needed.