what do you guys do for powering your IPads, Tablets, Laptops etc. while performing ? I use an IPad, Imix, and ITouch for lyrics and DJing. I keep them all plugged into chargers but the wire mess is getting to be too much and looks terrible. I,m just afraid of going total battery and having a unit die during a gig. The Imix. Has to be plugged in but wondering about the others.