second battery needed

get te d3400 xs ' as main battery and the red top to power your amps ' but yea your red top might be on its finals have you charged your optima?
No I've had it about 2-3 years no issues,I just want my headlights go stop dimming etc.

Thanks guys

 
No I've had it about 2-3 years no issues,I just want my headlights go stop dimming etc.
Thanks guys
2-3years can drain the capacity of the battery.

I'd have it load tested.

It will have increased resistance inside if the capacity has decreased. If you add another battery to the system while using that battery, it could rob power from the other battery constantly which will decrease the lifespan of the batteries and put more stress on the alternator.

 
2-3years can drain the capacity of the battery. I'd have it load tested.

It will have increased resistance inside if the capacity has decreased. If you add another battery to the system while using that battery, it could rob power from the other battery constantly which will decrease the lifespan of the batteries and put more stress on the alternator.
I will definitely get it tested before adding my new battery. Thanks for the info bro, trying to find a used ish one to save a bit , if not I'll be buying brand new prob

 
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