Damson Cisor BT5 Resonating Portable Bluetooth Speaker - Blue
Great for an iPad or iPhone or the like.  Sound quality definitely depends on what you set in on.  But an empty cardboard box usually is not that bad.  Interesting to try different objects.  It has what I consider good battery life.  I don't know how many hours I get out of a charge, but for my purposes I play some each day and charge every few weeks.  I only use with Bluetooth not plug into power.