Mnh complex is a Na(+)Li(+)/H(+) antiporter involved in Na(+) and/or Li(+) excretion. Na(+)/H(+) antiport consumes a transmembrane electrical potential, and is thus inferred to be electrogenic. Does not transport K(+), Ca(2+) or Mg(2+). Na(+) extrusion is completely inhibited by the H(+) conductor carbonyl cyanide m-chlorophenylhydrazone (CCCP). May form a heterooligomeric complex that consists of seven subunits: mnhA1, mnhB1, mnhC1, mnhD1, mnhE1, mnhF1 and mnhG1. Belongs to the CPA3 antiporters (TC 2.A.63) subunit A family.