Does a yellow top battery recharge all the time? I was told to get red for car audio?

first told people yellow top battery power 4000watt amp , when took circuit city told me need red instead because yellow tops not continuesly recharge red tops , told need keep recharging pumping power reds cheapier side true? want red or yellow?

i first told people yellow top battery power 4000watt amp , when took circuit city told me need red instead because yellow tops not continuesly recharge red tops , told need keep recharging pumping power reds cheapier...

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