H1 B expired

I had approved h1b petition which I applied on 2011 slot and approved on 2012.I never went for stamping.It got expired on Dec-14.Can I renew the same approval petition through other employer as I heard that I will not be coming under cap exempt or lottery and it is valid for 6 years.Please clarify.

Another employer can file a cap-exempt petition for you within 6 years of original approval date.