For everyday battery life: This strongly depends on the capacity of the battery, as well as other factors such as the quality of the cells, the way they are used and maintained, and the conditions that they’re used in. Manufacturer claims are usually made assuming favourable or lab conditions, so it’s worth taking these with a pinch of salt.
For the life of the battery before it needs replacing: Most batteries in e-scooters and e-bikes are lithium ion-based. This is the same basic technology as used in contemporary phones and laptops. They have a long lifespan and do not suffer from ‘battery memory’.
As a guide, most lithium ion batteries will last for 1,000 charge cycles before you see a noticeable drop off in performance. This will change based on the manufacturer and quality of the cells in the battery, how you are using it and whether you are using good practices to extend the battery health.
You can find out more about how to make your e-scooter battery last longer here: Battery Maintenance.