Optima Batteries 8040-218 D35 Yellow Top Dual Purpose Car Battery

Last updated date: July 17, 2020

DWYM Score
8.0

Optima Batteries 8040-218 D35 Yellow Top Dual Purpose Car Battery

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We looked at the top Car Batteries and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Car Battery you should buy.

Overall Take

In our analysis of 140 expert reviews, the Optima Optima Batteries Yellow Top Dual Purpose Car Battery placed 13th when we looked at the top 13 products in the category. For the full ranking, see below.

Editor's Note July 22, 2020:
Checkout The Best Car Battery for a detailed review of all the top car batteries.

Expert Summarized Score
8.5
17 expert reviews
User Summarized Score
7.0
500 user reviews
Our Favorite Video Reviews
What experts liked
Superior recharge rate. Superior starting power and long-term energy. Fast recharge rate of 4 to 6 hrs.
- BestReviews
Thanks to its thick, durable plastic exterior and use of AGM technology, this battery has 15 times the level of vibration resistance as competing products.
- Marine Battery Guy
February 28, 2017 | Full review
It’s also nice to note that this battery is maintenance free. So you won’t need to worry about getting your hands dirty, adding any water, or cleaning up any spills. Even better, I never experienced any leakage or corrosion during our time with it.
- Battery Focus
February 23, 2019 | Full review
It excels in the two most important departments, more precisely the CCA and MCA rating sections, boasting a 620 amps CCA rating and a 770 amps MCA rating.
- Product Reviews
January 18, 2019 | Full review
Reasonable price in comparison to other AGM models.
- Zentiz
January 6, 2016 | Full review
That’s an impressive punch for such a small battery. Paired with a three-year warranty from Optima Batteries, the 8040-218 D35 YellowTop model is the best dual purpose marine battery for a great price.
- Outside Pursuits
January 29, 2019 | Full review
This battery is ideal for vehicles that require more power due to electronic connectivity.
- Dunker Motor
Whether you are looking to power your new audio system or you need the extra starting power to get your engine going, the YellowTop should be able to provide everything you need. This battery also has the added benefit of being easier to install than many other options that you can choose from.
- Your Car Wiz
What’s nice about this model is that it’s small and lightweight making it very portable.
- Full Gleam
The battery is a small and lightweight making it very portable. It weighs 36 pounds and measures less than 10 by 7 inches.
- Fishing Picks
Overall quality of the material and ability to crank over the engine in various weather conditions is really impressive.
- My Car Needs This
January 22, 2019 | Full review
It has also been praised because of its optimal power, allowing it to be useful even for trucks and vehicles that are equipped with high-powered electronics.
- Battery Chargers Expert
With great endurance, it functions well when electrical loads are higher and it is ideal for drag racers. With constant performance at a great price, the spiral cell design helps you out with this awesome battery with optimal starting power.
- Jen Reviews
Optima is the best car battery for cold weather because of its low self-discharge rate and for having the ability of immediately returning to its standard charging despite a long winter hiatus.
- Equipment Area
It is one of the only genuine dual-purpose batteries on the market, making it perfect for a wide variety of demanding applications. And, as a bonus, it also has premium cranking power that ensures reliable starts no matter the conditions.
- Auto Mechanics Know
February 19, 2019 | Full review
Has a reserve capacity of 98 minutes to perform with absolute consistency
- Trolling Battery Advisor
The overcharging issue can be experienced due to the AGM technology used in this battery. Therefore, you should charge it carefully to make sure that you do not overcharge the battery as it can damage the performance and reduce the battery life.
- Mechanic Base
March 21, 2019 | Full review
What experts didn't like
Sporadic, anecdotal evidence of battery life that lasts less than one year.
- BestReviews
Because this battery uses AGM (absorbent glass mat) technology, you’ll need to charge it carefully to avoid overcharging and damaging the battery.
- Marine Battery Guy
February 28, 2017 | Full review
Not a direct fit for most battery boxes
- Battery Focus
February 23, 2019 | Full review
Although the AGM technology implies a higher sensibility to overcharging, the upsides of this design clearly outweigh this downside that can be prevented through carefulness when charging.
- Product Reviews
January 18, 2019 | Full review
Terminal hardware is not provided on purchase.
- Zentiz
January 6, 2016 | Full review
However, this model is quite more expensive than the Optima RedTop.
- Dunker Motor
Overcharging the battery can damage it
- Fishing Picks
Though it costs right around 170 dollars which is what the price point should be, it fits in a wide range of vehicles.
- My Car Needs This
January 22, 2019 | Full review
Warranty from third-party sellers hard to be honored
- Battery Chargers Expert
Might be a difficult fit in some cars
- Auto Mechanics Know
February 19, 2019 | Full review
Chances of overheating as it is an AGM battery
- Trolling Battery Advisor
The overcharging issue can be experienced due to the AGM technology used in this battery. Therefore, you should charge it carefully to make sure that you do not overcharge the battery as it can damage the performance and reduce the battery life.
- Mechanic Base
March 21, 2019 | Full review

From The Manufacturer

12-Volt, 620 Cold Cranking Amps, Size: 9 5/16" x 6 13/16" x 7 5/8" tall, Weight: 36.4 pounds, SAE Post,.300+ discharge/recharge cycles. 98 minutes reserve capacity for constant performance. Optimal starting power even in bad weather; the positive or red terminal is located to the right. Fifteen times more resistant to vibration for durability. This item is not for sale in Catalina Island. C20 Capacity - 48 Ampere hour.

Overall Product Rankings

Odyssey 65-PC1750T Automotive & LTV Car Battery
1. Odyssey 65-PC1750T Automotive & LTV Car Battery
Overall Score: 10.1
Expert Reviews: 9
ACDelco 48AGM Professional AGM BCI Group Car Battery
2. ACDelco 48AGM Professional AGM BCI Group Car Battery
Overall Score: 10.0
Expert Reviews: 8
Optima 8025-160 25 RedTop Starting Car Battery
3. Optima 8025-160 25 RedTop Starting Car Battery
Overall Score: 9.9
Expert Reviews: 5
Odyssey PC680 Car Battery
6. Odyssey PC680 Car Battery
Overall Score: 8.6
Expert Reviews: 11
Mighty Max ML35-12 Deep Cycle AGM Solar Car Battery
9. Mighty Max ML35-12 Deep Cycle AGM Solar Car Battery
Overall Score: 8.4
Expert Reviews: 17
DieHard 38188 Group 34R Lead Acid Car Battery
12. DieHard 38188 Group 34R Lead Acid Car Battery
Overall Score: 8.1
Expert Reviews: 7

An Overview On Car Batteries

If you are religious about your car maintenance, make sure to always ask your technician to check the life of your battery when you bring it in for routine maintenance. No one wants to be stuck because of a dead car battery. You’ll need a tow, a friend nearby to get you and some extra cash for a new battery when that happens. There is nothing good to say about that experience.

But you don’t have to experience this and can prevent it by taking several, easy precautions. In addition, when you take the precautions, you can shop for the battery you want without being in a rush. This will save you time and lots of money.

Your first step to preventing that dead car battery situation is to watch your time. There is no definite amount of time that batteries last, but an average of three to five years is what technicians estimate. There are quite a few factors that contribute to battery life: weather, maintenance of the vehicle and frequency of use. It is extremely important to test your battery every year and before you head out on a road trip.  If you buy your car used, make sure the battery that is in it is the appropriate size for the vehicle.

There are also certain things you can look for that indicate neglect. Heavy-duty use can really wear on a battery that is not suited for the technological equipment in the vehicle. Low water levels can damage your battery, as well as intricate mechanical audio or video enhancements in the car. These are all ways to prevent that dead car situation that kills your finances and really isn’t good for your vehicle.

Once you have realized that you are going to need to replace your car battery, you’ll want to know how they work so you can buy the perfect one for you. As most batteries do, a car battery stores energy for your car. Inside the battery is acid that produces electricity when reacting with the lead plates. The bigger the engine, the more powerful battery you’ll need.

Modern cars demand much more out of their batteries because of all the upgraded technology within them, so sometimes even a small vehicle will require a powerful battery if it has lots of electronic features. The Optima RedTop Starting Car Battery is great for a vehicle with high-end audio systems with a 12-volt power cell.

Your auto manual should assist in figuring out the battery your car needs. There are a few things to look for when buying the best car battery: Automotive battery electrolyte is a term that you should understand. The negative and positive lead plates turn into lead sulfate when the battery discharges. At that point, the electrolyte is depleted in sulfuric acid and becomes almost entirely water. During the charging process, the positive plate of lead dioxide and the negative plate of lead interact to give the electrolyte back its acidity. This acid is very dangerous so always be sure to wear protective gear when dealing with batteries.

Cranking amps tells the consumer how much the battery’s starting power is. You will need to look in your auto manual to find the CA number for your car battery. The cold-cranking amps is especially important to those operating a vehicle in frigid temperatures. It is the measure of amps deliverable in temperatures below freezing. A battery’s chemical process is significantly slowed down in temperatures below freezing to nearly half of what they are when the temps are warmer.

Maintenance-free is important and also pretty standard with today’s best car batteries. In the past, vehicle owners would have to add distilled water if the electrolyte levels were off. Automotive battery terminals or posts are supposed to be kept clean for optimum performance. When you get your car maintenance, ask the mechanic to clean those for you. There is a cleaning kit you can buy for those as well, so you can clean it on your own. Keeping these things in mind when you buy your next battery is what will save you time and money by extending the life of your battery.

For racing cars, you’ll want a high-output battery with an M6 Terminal Bolt. This type of battery is spill-proof and resistant to vibration. Some models have an absorbed glass mat, which is an extremely great feature since it suspends the electrolyte in fiberglass, keeping it safer from the elements. If you are looking for a replacement battery, the ACDelco Advantage AGM Automotive Car Battery is your best option. This replacement battery has very specific dimensions, so you must make sure the specs match up to your vehicle.

For an extended life battery, take a look at the Odyssey Automotive & LTV Car Battery. This battery has a 70% longer life in comparison to deep cycle batteries. The faster recharge of a full charge in 4-6 hours is an incredible feature as well. This is good for race cars as well, but always be sure to check your vehicle’s specifications in the manual to ensure a good match.

DWYM Fun Fact

Car batteries are the most recycled product in the world. This is because roughly 99% of the battery and its parts can be re-purposed. Buying a recycled battery also saves a significant amount of money in comparison to buying a brand-new one.

Car batteries weren’t used until the 1920s. Before the 1920s, cars didn’t use batteries because their electrical components were very limited and didn’t require batteries. The first company to put batteries in vehicles was the Hudson Motor Car Company in 1918.

The Car Battery Buying Guide

  • Short trips around town will really tax your car battery because they don’t give it a long time to charge.
  • Keep your battery secure under the hood so it doesn’t vibrate and move with bumps and bends. If it is moving around, the circuits can short.
  • Cleaning the terminals will also give your battery a longer life. The terminals are easy to clean and it will extend the life of your battery.
  • The general maintenance of your vehicle is also important to your battery life. If one moving part is out of commission, it can seriously tax your battery and shorten its lifetime.
  • Idling is not good for your battery, especially if you have lots of electronics on.
  • Test your battery frequently, so you know if it needs replacing or to detect another serious issue within your vehicle.