I have query pertaining to rechargeable AA batteries. I have got a digital camera which takes four rechargeable AA batteries. But I have only got two Duracell rechargeable AA batteries and the other two are from some other brand. So my query is that it is safe to use two different brands of rechargeable AA batteries in camera? Or I should by all from the same brand? I would really appreciate your replies. Please get back as quickly as possible. Thanks.