What is the battery life of Hammerhead One? Ajay April 13, 2017 08:48 Updated Follow The device is equipped with a 495 mAh lithium polymer battery. It lasts for 7-9 hours on ride once fully charged. Related articles Unboxing & Setup Why there is no user manual? How do I make a route in General? My GPX file is not opening in Hammerhead app I was charged by Royal Mail for the delivery. Why? Comments 0 comments Please sign in to leave a comment.