If you wanted, you could put the Aiwa Exos 9 in your suitcase. It's just 18 lbs and delivers 200 continuous watts of power. And it has a lithium battery.
https://www.amazon.com/Aiwa-Exos-9-Portable-Bluetooth-Speaker/dp/B00WF78GS4Oh, but as an update, months ago, I returned the Aiwa Exos 9 I purchased for local gigging not because it didn't sound great, but my current rig has been so dependable and convenient, it didn't make sense to upgrade.
But that 49 key controller has some bad reviews as far as velocity sensitivity of the keys and problems interfacing with included software.
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