The dependence of the charge exchange lifetimes on the mirror latitude for ions mirroring off the geomagnetic equator has been re-computed using the improved hydrogen distribution models which have become available since the earlier calculation by Liemohn. The Chamberlain model, with the input parameters determined by recent satellite observations, has been used to define the spatial distribution of the neutral hydrogen environment through which the ring current ions traverse. The resultant dependence of the charge exchange lifetime, &tgr;, on mirror latitude, &lgr;m, is best fit by the approximation &tgr;m=&tgr;ecos3.5&lgr;m, where &tgr;e is the chare exchange lifetime for the equatorial particles. This is a significant change from the cos6&lgr;m approximation of the previous results.