![]() ![]() Here is another thread where this is discused. Most batteries you see in the stores the Pos is on the left and the Neg is on the right. That is the way they are usually displayed in the stores. If you are looking at the battery with the posts closest to you the Neg is on the left and the Pos is on the right. One more thing to remember our battery post are reversed. We maintain 4 large facility UPS and 7 Engine generators, some as big as 225KW V-12 Detroit Diesels, And those are still considered small. This is all at an Air Traffic Control Tower. Granted those are all "deep cycle" Batteries but it even applies to our engine generator starting batteries. I maintain large facility UPS systems with 30+ batteries and that is the standard we go by for replacement. I am also in the market for a new battery based on that test because any time a battery is 20% below the rated value it is showing signs of deterioration and it is time to be replaced. It has been in the teens and 20s here for the last week in the morning and it has started everytime. I load tested the battery in my 04 recently and it only measured 450CCA for a 5 year old battery. I don't think 100CCA will make it or break it. OPTIMA Batteries offers a range of deep cycle and AGM batteries for various vehicles, including cars, trucks and marine. Optimas are pretty good batteries I just think they are over priced. Just make sure you get the same rated CCA or better that will fit. The factory Batteries in or 4Runners are 720CCA. Trucks with winches, cars with high-demand audio systems, commercial trucks and equipment all rely on this battery to provide ultimate starting and deep cycle power." It is commonly used in any application that demands cranking power and heavy cycling. "The YellowTop is one of the only true dual-purpose batteries available. ![]() The yellow top is purely a deep cycle battery which is not designed for the demands from cranking the starter. ![]()
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