How long does the battery last between charges?

Most current smart bottles use USB-C or magnetic charging and advertise 2–4 weeks of battery life per charge in typical use; LARQ claims up to a month, VSITOO claims 30 days, and WaterH claims about two weeks. Reviewers tend to confirm the multi-week figures are realistic, though heavy use of UV-C cleaning cycles or constant Bluetooth syncing shortens runtime.