Battery help

[Turnt Audio 10+ year member]

I built a custom audio cooler and need a good battery to power it. I've been using motorcycle batteries that will only last about 2 hours before it has to be recharged. What are some of the best/longest lasting car batteries I can get? Would it be cheaper to order it online or buy at a store?

Also, will it ruin a battery if I keep running it until it dies, charge it,then keep doing that? This is a mobile system where I wont always be able to keep the battery charging, I will basically play music until it stops, charge the battery, then play more music...

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[Alrojoca 10+ year member]

What you need is a Deep Cycle battery AGM type, these batteries can take the discharging and charging better than standard batteries you may need a special charger for AGM batteries though. Good luck!