Akai's MPK Mini Play is a compact battery-powered beats machine
 

Portable instruments that run on AA batteries have been popping up for a while now. There's the Roland Boutique line, Korg's Monologue and even the iRig Keys I/O from IK Multimedia. Now Akai is getting into the portable game with an affordable update...

https://www.engadget.com/2018/10/12/...di-controller/