Do you have a coffee pot that you can use without electricity in your supplies?
Communications during an emergency is important. During an emergency contacting people is a vital action. However, everyone wants to contact someone. Generally the phone lines will be tied up for a period of time, especially cell phones.
Is your list of phone numbers current? Have you written down the most important numbers in case your electronic device fails? Have you identified which numbers are cell phones and which ones are land lines? And do you have an alternate plan for contacting people?