How long do I need to charge new Duracell AA batteries for first time?

These are Duracell rechargeble 2500mah AA for my digital camera and it doesn't say on package how long they should be on charger for the first time. Can you ruin them if you leave them on to long? Thanks

There is a bulletin regarding charging these batteries.
http://www.duracell.com/oem/rechargeable...

Doesn't your charger have a light on it??

If not give it 24 hrs, it won't overcharge,unless you are using a 1/2 hr charger

These S/b NiMH batteries....NiCad batteries will overcharge