I have got a Camcorder. I have got it worked by using 2.9 volt batteries. But I could not make it to last long. Normally it just plugs into the wall with a 12 volt and 500 mah power adapter. I have got query pertaining to this. How much D batteries do I need to make it work. I need at least two hours of back up. Are D batteries good replacement for camcorder batteries? Or do I need to buy camcorder batteries and then solder the leads to it? I want an early response. I would really appreciate it. Thanks.