An intelligent battery recharger charges up to 4x aa or aaa size nimh rechargeable batteries also includes 4x 1 5v aa batteries only to be used with rechargeable batteries using smart technology the energizer intelligent charger can tell you how much power your batteries have and give an indication of when they will be fully charged it even recognises if they are faulty or too old to be charged again intelligent nimh battery recharge unit includes 4x 1 2v 2000mah aa nimh rechargeable bat