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Hi, Does anyone know the pin outs for a Canon 1100D battery pack? I am trying to build an external power supply for my 1100D and have bought a cheap replacement battery that I have pulled apart, but there are four contacts across it and I am not sure which ones are the +ve and -ve terminals. I have taken some pictures of the regulator board that was at the top of the two batteries: The first picture shows the component side with the three contact pads marked B+, B- and Bc. The B+ and B- pads were connected to the +ve terminals of the batteries and the Bc was connected to the -ve terminals of the batteries. However, when I connected these terminals up to a regulated bench power supply unit set to 10 volts DC, I was only getting a couple of volts at a couple of the contact pads (shown in the second and third photos). So rather than go through the regulator board, I thought I would just solder my dc/dc converter to the correct terminals to power the camera. This is where my question comes in. Which of the four contacts as shown in the last picture are the +ve and -ve terminals. Sorry for the waffle and thanks if you can help. BTW: there are no markings on the battery case or label itself to help - cheap copy component made in China.