Substitute batteries are offered to purchase individually by using our Web site. Remember to see instructions underneath on how to replace the battery – Specific treatment has to be taken not to wreck the PCB – we are not to blame for damage due to battery substitution. Serious-Time GPS Tracking: https://medium.com/@trackerfit11/caravan-trackers-and-why-they-matter-for-theft-protection-dd44f62fcad7