Sikai Amazfit Stratos Charging Dock. Replacement wireless charger dock for Amazfit Stratos Smart Watch. Easy to use, just plug your watch to the charging cradle, and then connect the USB to PC or AC charger to get your watch charged. Amazfit Stratos Multisport GPS Smartwatch Watch Charger made of high quality material to make sure your safety and quick charge when using. Power Protection Inside (PTC) keeps your Amazfit Stratos safe from over-current or over-charging.