Just like your other devices, it depends on how often you use it between charges. We’d recommend charging our Gleam Brush for 12 hours when it arrives. After that, just place it on the charging base after each use. If you happen to avoid the charging station for a while, we estimate you’ll get about three weeks use on a full charge.
If you want to travel with it, you shouldn’t need to bring the charger on trips lasting less than 20 days.