Anyone tried using a battery pack with Roon Nucleus +?

Instead of the switching power adaptor Roon supplied with the Roon Nucleus + or one of many Linear Power Supplies from third parties, have any of you tried using a battery pack? Say one that can provide up to 19V and up to 5A?

If yes, how has it been over time?

Why bother, I can only see disadvantages of running a server of a battery.