Huawei band 6

The Huawei Band 6 weighs just 18 grams (without the strap). It's body measures 43x25.4x10.99mm, has a single side button for navigation and is rated for 5ATM water resistance. Battery life is rated at up to two weeks of regular use or 10 days of heavy use and charging is done via a magnetic charger. Huawei also mentions that just 5 minutes of charging should get you enough juice for 2 days of operation.