A: An inferior vena cava filter is a cone-shaped metal device that prevents blood clots from traveling to the lungs, according to Cleveland Clinic. Doctors place this device in the inferior vena cava to catch blood clots that have broken loose, explains the University of Michigan Health System.
Fitbit Blaze requires a maximum of 1 â 2 hours to charge fully. It comes with a rechargeable lithium-polymer battery. Since itâs a smartwatch comes with the fitness tracker. The Fitbit Blaze has the improved battery life and it can go up to 4-5 days per charge.
1 Hold both buttons again to turn it back on. 2  Charge/Force-Plug the charging cable into your Charge, Charge HR, or Force. 3  Insert the other end into a USB port. 4  Press and hold the button on the Charge for about ten seconds until you see the Fitbit icon and version number.