Use it and see how long it lasts. It may last forever. Egos have circuitry build in, i'm sure you will be safe.
But, you will get different answers.
My opinion is that
joyetech is head and shoulders above the clones. They are also the safest.....they have something in the circuuitry that is proprietary.
I've vaped for over a year and 4 months, my joyetechs are still going strong...
The clones I had are all kaput for one reason or another. Sometimes the buttons didn't click quite right. Another time the head came off with very little pressure. One didn't survive a drop onto a carpet.
Aren't we talking $3-5 anyway, for something you are going to use every day for a long time?