Mackie FreePlay Lithium Ion Battery for Amplifier Part<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Use FreePlay without the need to be plugged </span></li><li><span class="a-list-item"> Fits in the battery compartment instead of regular disposable batteries </span></li><li><span class="a-list-item"> Recharges when not in use using FreePlay's power cord. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31haSSs3dCL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31k3vcsM9mL.jpg" noproxy>