... voltage of over 3.2V until final discharge— three times as much voltage as a Ni-Cd or Ni-Mh battery ... provides.it takes just 1/3 the number of lithium ... ion batteries to provide the equivalent amount of voltage form Ni-Cd or Ni-MH ... Phosphate batteries has no memory effect,seen in Ni-Cd,NI-MH,causes charging capacity to be reduced by ...