Hey Subaru enthusiasts! If you're a proud owner of a 2017 Subaru Forester, you know how important it is to keep it running smoothly. One of the key components to ensure reliable performance is the battery. Choosing the right battery size for your Forester isn't just about finding something that fits; it's about ensuring your vehicle has the power it needs to start reliably, run all its electrical components, and keep you safe on the road. Let's dive into everything you need to know about selecting the perfect battery for your 2017 Subaru Forester.

Understanding the Importance of Battery Size

So, why is battery size so crucial? Think of your car battery as the heart of your Forester's electrical system. It provides the initial jolt of power needed to start the engine, and it also supports all the electrical accessories, such as the lights, radio, air conditioning, and even the advanced safety features that your 2017 Forester is equipped with. Using the incorrect battery size can lead to a host of problems, including:

• Starting Issues: The most obvious issue is difficulty starting the engine, especially in cold weather.
• Electrical Problems: Insufficient power can cause flickering lights, malfunctioning electronics, and other annoying electrical glitches.
• Reduced Battery Life: A battery that's constantly strained will wear out faster, costing you more money in the long run.
• Potential Damage: In extreme cases, using the wrong battery can even damage your vehicle's electrical system.

Therefore, getting the right battery size is not just a matter of convenience; it's a matter of ensuring the longevity and reliability of your vehicle. Now that we understand why it's so important, let's get into the specifics of what battery size you need for your 2017 Subaru Forester.

Recommended Battery Size for the 2017 Subaru Forester

Okay, guys, let's get down to the nitty-gritty. For the 2017 Subaru Forester, the recommended battery size is typically Group Size 35. This is a common size for many Japanese vehicles, and it provides a good balance of power and physical fit for your Forester. However, it's always a good idea to double-check your owner's manual or consult with a trusted mechanic to confirm this information for your specific vehicle.

Group Size 35 batteries generally have the following specifications:

• Voltage: 12 volts (standard for most car batteries)
• Cold Cranking Amps (CCA): Typically around 620-650 CCA (more on this later)
• Reserve Capacity (RC): Usually around 100-120 minutes
• Dimensions: Approximately 9.06 inches (L) x 6.89 inches (W) x 8.82 inches (H)

These specifications can vary slightly depending on the brand and type of battery, but they give you a general idea of what to look for. When shopping for a new battery, make sure to check these specifications to ensure that the battery meets or exceeds the requirements for your 2017 Subaru Forester. Remember, it's always better to err on the side of having more power than less.

Understanding CCA and Reserve Capacity

Let's break down two important terms you'll encounter when choosing a battery: Cold Cranking Amps (CCA) and Reserve Capacity (RC). Understanding these terms will help you make a more informed decision and ensure you get the best battery for your needs.

Cold Cranking Amps (CCA)

Cold Cranking Amps (CCA) is a measure of a battery's ability to start an engine in cold weather. It indicates the number of amps the battery can deliver for 30 seconds at 0 degrees Fahrenheit (-18 degrees Celsius) while maintaining a voltage of at least 7.2 volts. In simpler terms, the higher the CCA, the better the battery's ability to start your car in cold conditions. This is especially important if you live in a region with harsh winters.

For the 2017 Subaru Forester, a battery with a CCA rating of 620-650 CCA is generally recommended. However, if you live in an area with extremely cold winters, you might want to consider a battery with an even higher CCA rating to ensure reliable starting performance. Always check the manufacturer's recommendations and consider your local climate when choosing a battery with the appropriate CCA.

Reserve Capacity (RC)

Reserve Capacity (RC) is a measure of how long a battery can continue to power essential electrical components if the alternator fails. It's the number of minutes a fully charged battery can deliver 25 amps at 80 degrees Fahrenheit (27 degrees Celsius) before the voltage drops to 10.5 volts. In other words, RC tells you how long you can drive with your headlights, radio, and other essential accessories running if your alternator suddenly stops working.

A higher reserve capacity is always better, as it gives you more time to get to a safe location or repair shop if your alternator fails. For the 2017 Subaru Forester, a battery with a reserve capacity of 100-120 minutes is typically recommended. This should provide ample time to handle most alternator failure situations. When comparing batteries, consider the reserve capacity along with the CCA to make the best choice for your needs.

Choosing the Right Battery Brand and Type

When it comes to choosing a battery for your 2017 Subaru Forester, you'll find a wide variety of brands and types to choose from. Here are a few popular and reliable brands to consider:

• Optima: Known for their high-performance AGM (Absorbent Glass Mat) batteries, Optima batteries offer excellent CCA and reserve capacity, as well as superior vibration resistance.
• DieHard: A trusted brand with a long history of producing reliable automotive batteries, DieHard offers a range of options to suit different needs and budgets.
• ACDelco: Another well-known brand, ACDelco batteries are known for their quality and durability, providing dependable performance in various conditions.
• Interstate: Interstate batteries are widely available and offer a good balance of performance and value.

As for battery types, you'll generally find two main options:

• Flooded Lead-Acid Batteries: These are the most common and affordable type of car battery. They require regular maintenance, such as checking and refilling the electrolyte levels.
• AGM (Absorbent Glass Mat) Batteries: AGM batteries are more expensive but offer several advantages, including higher CCA and reserve capacity, better vibration resistance, and maintenance-free operation. They are also less prone to leaking and can be mounted in various orientations.

For the 2017 Subaru Forester, either a flooded lead-acid battery or an AGM battery will work. However, if you're looking for the best performance and longevity, an AGM battery is generally the better choice. While they cost more upfront, they can last longer and provide more reliable power, ultimately saving you money in the long run.

Installation Tips and Safety Precautions

Once you've chosen the right battery for your 2017 Subaru Forester, the next step is to install it. While you can always have a professional mechanic do the job, it's also possible to install the battery yourself with a few basic tools and some patience. Here are a few tips and safety precautions to keep in mind:

1. Gather Your Tools: You'll need a wrench (usually 10mm or 13mm), a battery terminal cleaner, a battery terminal protector, and safety glasses.
2. Safety First: Always wear safety glasses to protect your eyes from battery acid. Disconnect the negative (-) terminal first to prevent short circuits.
3. Disconnect the Terminals: Use the wrench to loosen the nuts on the battery terminals. Disconnect the negative (-) terminal first, followed by the positive (+) terminal. Tuck the terminals away from the battery to prevent accidental contact.
4. Remove the Battery Hold-Down: Most batteries are secured with a hold-down clamp or strap. Remove this to free the battery.
5. Lift Out the Old Battery: Carefully lift the old battery out of the tray. Be careful, as it can be heavy and may contain corrosive acid.
6. Clean the Terminals and Tray: Use a battery terminal cleaner to remove any corrosion from the terminals and the battery tray. This will ensure a good connection with the new battery.
7. Install the New Battery: Place the new battery in the tray and secure it with the hold-down clamp or strap.
8. Connect the Terminals: Connect the positive (+) terminal first, followed by the negative (-) terminal. Make sure the nuts are tight but not overtightened.
9. Apply Terminal Protector: Apply a battery terminal protector to prevent corrosion. This will help extend the life of your battery terminals.
10. Double-Check Your Work: Ensure that all connections are secure and that the battery is properly installed before starting your vehicle.

Important Safety Note: Battery acid is corrosive and can cause burns. If you get battery acid on your skin or in your eyes, flush immediately with plenty of water and seek medical attention.

Maintaining Your 2017 Subaru Forester Battery

To maximize the life of your 2017 Subaru Forester battery, it's important to perform regular maintenance. Here are a few tips to keep your battery in top condition:

• Keep the Terminals Clean: Regularly clean the battery terminals to remove any corrosion. This will ensure a good connection and prevent electrical problems.
• Check the Electrolyte Levels: If you have a flooded lead-acid battery, check the electrolyte levels regularly and add distilled water as needed.
• Avoid Short Trips: Short trips can drain the battery without giving it enough time to recharge. Try to combine errands or take longer trips occasionally to keep the battery fully charged.
• Turn Off Accessories: Make sure to turn off all accessories, such as lights and the radio, when you turn off the engine. This will prevent the battery from draining unnecessarily.
• Get a Battery Test: Have your battery tested periodically by a professional mechanic. This will help you identify any potential problems before they become major issues.

By following these maintenance tips, you can extend the life of your battery and ensure reliable performance for years to come.

Conclusion

Choosing the right battery size for your 2017 Subaru Forester is essential for ensuring reliable starting, optimal electrical performance, and long-term vehicle health. By understanding the importance of battery size, CCA, and reserve capacity, you can make an informed decision and select the best battery for your needs. Remember to consider reputable brands, choose the appropriate battery type, and follow proper installation and maintenance procedures. With the right battery and a little bit of care, you can keep your 2017 Subaru Forester running smoothly for years to come. Happy driving, folks!