So, we are getting married outdoors in a park. The problem is, there is not an electrical power source near our site for us to use. My fiance does have a large speaker (for his guitar) and a mic but since we have no where to plug them in we are in a bind. We need the speaker for our music and for the mic for the ceremony. Does anyone know where and if we can find some kind of large portable battery that we can use for our speaker? Any help would be greatly appreciated!