Depending on how often you use your mobility scooter, sealed lead-acid mobility scooter batteries last about 12 to 18 months, or roughly 300 to 500 charge cycles, before they need replacing. If your scooter no longer holds a charge, loses range, or slows down on hills, a tired battery is often the reason. Let's explore how to confirm the battery is actually the problem, how to test it yourself, and how to choose the correct replacement so your new battery fits and performs the way it should.