yellow top or red top
 

i just bought 2 12" rockford p3's and a hifonics amp and wanted to upgrade my electrical system. is it necessary for me to replace the stock battery and if so should i go with the red top or the yellow top from optima

yellow top

Red Top is only really good for starting. Yellow Top is what you want.

You might also want to look into the "Big 3 Upgrade", it's basically to upgrade your Grounds (Neg Battery to chaise, Neg Battery to engine), and Power (Positive Battery Terminal to Alt output).

Product Information
What is the difference between RedTop, YellowTop and BlueTop batteries?

RedTop: Use this for normal engine starting where an alternator immediately monitors the state of charge and provides energy to the battery whenever it is needed. This would describe most stock vehicles.

Automotive and RV under-hood starting
Heavy equipment where starting is the primary function
Diesel powered vehicles with no aftermarket electronics

YellowTop: Use this when electrical loads are higher than average, or when the discharge cycle is more than typical engine starting, such as vehicles without alternators. This also includes vehicles with significant electrical loads that may exceed the average alternator output (for example aftermarket audio system, GPS, chargers, winch, snowplow, inverters, drag cars). This can also include vehicles that have a lot of electronics from the factory, such as a minivan with power sliding doors and a DVD player, especially if the DVD player is used when the engine isn’t running.

Racing vehicles without a charging system (alternator or generator)
Dedicated drag racing vehicles
Diesel powered vehicles with aftermarket electronics
Car audio/video applications exceeding 250 watts over the OE system
Vehicles or heavy equipment with inverters, hydraulics, winches or other accessories
Electric vehicles

BlueTop: The BlueTop starting battery (dark gray case) is to be used when a dedicated starting battery is required and it should never be used for cycling duty. The dual purpose BlueTop (light gray case) can be used for both starting and deep cycling; it is a true deep cycle battery with extremely high cranking power.

Trolling motors, marine applications with heavy electrical accessories and RVs should use a dual purpose BlueTop (which is both a starting and deep cycle battery)
Use a BlueTop starting battery for marine applications and RVs when the battery’s only function is engine starting
Note: The difference between BlueTop and YellowTop deep cycle batteries is that BlueTop batteries have both automotive (SAE) posts and threaded posts, while YellowTops (other than D31T) only have SAE posts.

If you ever get confused on the color tops just remember: if it has a dark gray case then it is a starting battery; if it has a light gray case then it is a deep cycle (dual purpose) battery.

- From the battery company

Yellow top, as specified!

thanks for the yellowtop i saw a couple on amazon for about 189 i think but the reviews where bad. people had the battery come in pieces. does anybody know a better place to buy them?

just make sure the d35 is the one i need to get right and does require any afterwork or does it perfectly fit in

Autozone / Advance :dunno:

Don't buy from Amazon !!!!

They ship it with a box that "barely fits" the battery" with no insulation inside. So yeah UPS loves to throw shit around and at 38 lbs, BOOM and the plastic case just crack. stuff leaks out, game over.

another problem with buying from Amazon is that you WILL NOT get ANY warranty from Optima. Cuz Amazon is "NOT" their Authorized Dealer (I hate these bs)

like 1.3 said, just buy them from Autozone/AAP. I prefer AAP because you can just use a 50 dollar coupon to buy a yellowtop, and you will get Full warranty from them.

and yes its the D35. it comes with a height adapter to fit.