Generally, clearomizers can be used for a very long time, but the coil heads (as heating elements) do burn out over time and need replacing every 2-3 weeks, depending on usage. A 'tired' coil head will create weak vapor with a slightly burnt taste - an indication that its time has come. This coil head comes with a built-in base can be screwed onto the bottom of the Kanger E-Vod Clearomizer and voila, fresh vapes!
VB Verdict : It's cheap to replace a coil head and saves you money from buying a new clearomizer. Keep a few spares and your clearomizer will be good for the next few months. This one is bottom coil and comes with a base - sweet.