Question about hooking up second battery

[jpinney0428]

So ive just picked up an energie pr4000 to throw in back and I was trying to figure out if i should replace my main battery with a brand new one as well before i wire the second one up? Im getting mixed answers on what to do and figured this would be the best place to go for and answer
thanks in advance

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[marc2112 10+ year member]

So ive just picked up an energie pr4000 to throw in back and I was trying to figure out if i should replace my main battery with a brand new one as well before i wire the second one up? Im getting mixed answers on what to do and figured this would be the best place to go for and answer
thanks in advance

If it's not 15 year old and keeps its charge you're good.

 

[jpinney0428]

If it's not 15 year old and keeps its charge you're good.

Yeah its prob around 2 years old and hasnt had problems yet. thanks mate

 

[Bobbytwonames 5,000+ posts]

So ive just picked up an energie pr4000 to throw in back and I was trying to figure out if i should replace my main battery with a brand new one as well before i wire the second one up? Im getting mixed answers on what to do and figured this would be the best place to go for and answer
thanks in advance

Is your main battery an AGM or a Lead-Acid?