Porsche 997: Which Replacement Battery to Use?

This article applies to the Porsche 997 (2005-2012).

Visit any auto store and you’ll see there are more than enough options out there, with all different costs and promising different levels of performance. You want the best for your Porsche 997, but which battery out there qualifies as “best” of the rest? There are a number of brands Porsche owners turn to when it comes time to replace the battery in their car. They’re outlined below, and include some specs like price, size, performance, and warranty. Hopefully, this will help guide you to finding not only the right battery for your budget, but the right battery for your Porsche 997.

Fortunately, the Porsche designers know this, and so in the battery tray, there are three threaded holes and one open hole to accommodate multiple battery sizes. When you look at replacements, none will match the exact size of the factory battery, but most will likely fit. The ballpark range you want to go for is approximately 7 inches wide, 12.5 inches in length, and 7.5 inches for height. In some places, you might see a “group size.” For a 997, you’ll want to stick with H7 LN4 (94R). Note that these groups can vary based on distributor, so it never hurts to ask a customer service representative on site if they think the battery you’ve chosen will fit your Porsche 997.

Replacement Batteries

Porsche OEM

Part Name – N/A

Weight – 59 lbs

CCA – 740-800 depending on model

Price – $300+

Warranty – N/A

The OEM battery is what comes equipped in your 997 from the factory. Purists who insist on OEM parts only need look no further. Many forum users complain of weak battery life, and the frequency in which users note flat batteries or malfunctions associated with the original battery. Fortunately, the original battery does not have the cost of recoding the charging system to accept it, a cost that does affect some aftermarket options. Recommended for those who want only original parts in their 997, at the expense of expense.

Duracell Ultra Platinum

Part Name – Ultra Platinum

Weight – 57.75 lbs

CCA – 850

Price – $197.99

Warranty – 48 months

The Duracell was praised for its easy availability, no hassle fitment, and superior warranty to the other listed competitors. It offers superior cold cranking amps at 850, which means that it is better suited to cold starts than the OEM battery. If your 997 is a daily driver, CCA is a figure that you care about. Recommended for those who want the most comprehensive warranty.

Interstate Mega-Tron Plus (MTP)

Part Name – Mega-Tron Plus

Weight – 42.9 lbs

CCA – 790

Price – $210.95

Warranty – 30 months

The Intestate battery seems to be the most frequently discussed replacement battery among Porsche enthusiasts, for a variety of models. Their MTP offering is the lightest in the test as well. It does not have as comprehensive of a warranty as other aftermarket options available, and it is the most expensive of the listed aftermarket batteries. This battery does not require any coding or modifications to work with your 997. Recommended for those who want the lightest option of this comparison.

Energizer 108-94R

Part Name – 108-94R

Weight – 55 lbs

CCA – 765

Price – $145

Warranty – 36 months

The Energizer battery offers the middle-of-the-road specs in terms of cold cranking amps and warranty. However, the scales tip in its favor due to its low price point. This option tends be roughly the same price as our final option, depending on your local market pricing, and may end up being the least expensive option of this comparison. Recommended for those who want the budget solution for their vehicle, with little compromise in terms of performance.

Audi OEM

Part Name – Audi A4 OEM

Weight – 59 lbs

CCA – 740-800 depending on model

Price – $120+

Warranty – N/A

The budget OEM solution is the original battery from an Audi A4. It happens to be the same unit as the 997 battery, without the Porsche logo and associated markup. If OEM quality is your shtick, but the over-priced Porsche battery isn't your fancy, then this is your winner. Recommended for those who want the budget OEM battery solution.

Related Discussions

• 997 Battery Replacement - Rennlist.com
• Alternative to OEM Battery - Rennlist.com
• How to Replace Battery - Rennlist.com