What is the warranty on my 11Ah or 17.5Ah battery? June 20, 2019 16:38 Updated Follow Both the 11Ah and 17.5Ah batteries have a two year warranty. More information on our warranty policy can be found here. Related articles What is the warranty policy for the 11Ah and 17.5Ah models? What is the Blix return policy? Do I need to register my bike to start my warranty? Comments 0 comments Please sign in to leave a comment.