Duracell universal battery charger cef22 duracell 5000394088320 p this fast charging battery charger is ideal for multiple nimh batteries it will charge up to 4 aa aaa c and d batteries at the same time or a single 9v battery p p the charger is capable of charging up to 4 batteries at once the charge time is around 6 to 8 hours depending how much power is left in the batteries an led indicator shows charging status red for charging turning green when your batteries are ready to