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About 2.5 hours. After 2 hours you will want to take it off, wash your face with cold water and do something else.
Sorry, there was a problem. Please try again later.With moderate usage, if its like the age of the one I had, a couple of years old, probably a good few (4-5?) hours constant usage. if you are just using it a bit, (hour or two here and there) you should be able to let it sit nearly a week between charges.
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