Today Professor Pow told me that the shipping on the replacement battery I selected was such that it probably would not arrive for a week and told me to look for something that we could get more easily. As a result I spent most of the day shopping online for a suitable replacement that was closer to home. What I found was that there are not that many suitable replacement to begin with and none that would get here more quickly. After learning this the hard way I told Professor Pow that we would just have to wait for the one I had picked out originally because it was the best replacement. After that I spent my time researching how to move files between the two Raspberry Pis.