Hi. All. This is my first post. I have an Eos 1000d which is a few years old, having just bought a wide angle lens to add to my telephoto, it appears that my secondary battery has gone phut. The main battery is draining down over a couple of days with the camera switched off. I have bought a new main battery as I assumed that it was on the way.However it is still happening . I think the biggest clue is that when you take the main battery out and then replace it you have to re set the time and date. I have done a bit of searching and now know that the secondary battery is not very usable replaceable, I presume its soldered to the PCB ? I am fairly handy with this type of thing doing a fair bit of work on car ECUs etc. Can some one out there confirm for me where the battery is before I start taking it apart please.Of course if any body has any other suggestions as to why this is happening I would be grateful for your input. Many thanks in advance.