I'm not an electrical engineer, so please forgive my lack of technical terminology. I'm researching an idea that requires me to create a PCB that will have a camera module record video and store it to a microsd card. I'd like it to be able to record for 8-12 hours. How can I calculate what battery will get the job done, given a specific camera module and microcontroller?
What is the smallest battery that I could use to accomplish this, you think?