Both are acceptable. Most dictionaries show only the singular form if it is regular. com/Minutes
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hrsaneiThanks for your reply.I do believe that mins is widely used in variety of context. I found many sources saying mins& min both as the short form of minutes but I just posted the ones that supported my side. Moreover, I am fully aware of the reliability of answers.com and that's the reason I never post my questions there, in that site one can find different answers