  We present the current status of the analysis of about 1.7 billion KSKL pair
events collected at DAFNE with the KLOE detector to determine the branching
ratio of KS -> pi e nu decay and the lepton charge asymmetry. This sample is ~4
times larger in statistics than the one used in a previous KLOE analysis,
allowing us to improve the accuracy of the measurement and of the related tests
of CPT symmetry and Delta S = Delta Q rule.
