Confused on Lithium Battery

Im getting a lot of mixed answers on if what I am doing is possible or not. I’m building a truck bed toolbox speaker rack with 4 mid range speakers and 2 horn-tweeters in a rack that folds in and out of the toolbox.

My question most simply put is - If I’m only hooking up 4 mids and 2 tweeters to a 1500 watt amp, could I run this system off of a rechargeable standalone lithium battery as I’ll only be using this system for 30 or so minutes at a time maybe 1-2 times a week.

I’ve been hearing mixed answers on if they are safe or worth the money, or if they hold enough charge to use it for up to an hour at a time.