2015 Porsche 911 Battery Size
GarageDex's verified fitment data shows the 2015 Porsche 911 uses a BCI Group 48 battery (some versions use Group 49), rated about 660-760 cold cranking amps (AGM).
Key takeaways
- Battery: BCI Group 48, 660-760 CCA, AGM.
- Replace with the same Group 48 (some versions use Group 49 - match the one you are removing).
- In cold weather, choose a battery at or above 760 CCA.
- This car needs an AGM battery - a standard flooded battery is not a valid replacement.
- Battery type (OEM)
- AGM
- Cold cranking amps (CCA)
- 660-760
- Terminal position
- Standard-terminal layout
- Dimensions (L×W×H)
- 278×175×190 mm
991; OEM AGM ~70Ah (H6 / 48). Always confirm against your owner's manual or current battery label.
The right battery for your 2015 Porsche 911
Match the group size (Group 48) and aim for at least 660 CCA - more in cold climates. This car needs an AGM battery from the factory - do not fit a standard flooded battery. A battery is heavy to ship, so buying in person can win once you count free install and the core-charge refund - but to compare prices and reviews:
As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.
Jump starter and charger for the 2015 Porsche 911
Of the engines offered on the 2015 Porsche 911, the 3.8L gas needs the biggest jump starter. NOCO rates its Boost jump starters by engine size, and the smallest one rated for that engine is the GB20 (500 amps peak, gas engines up to 4.0L). Any jump starter whose maker rates it for a 3.8L gas engine or larger will do. If you live somewhere cold, the next size up gives you more margin.
To keep the battery topped up while the car sits, a 1-amp smart maintainer is enough for any car battery. To recharge one that has gone flat, use a charger rated for at least 100 Ah, such as a 5-amp unit. This car uses an AGM battery, so pick a charger with an AGM mode.
Engine ratings from NOCO's Boost size chart; charger capacity from NOCO's GENIUS1 and GENIUS5 specs. Paid links: we may earn a commission at no extra cost to you.
What does a 2015 Porsche 911 battery cost?
| Typical price | $125-320 |
| Typical service life | 4-7 years |
| Cost per year | ~$18-80 |
| Core charge | ~$22 (refundable) |
Expect roughly $125-320 for an AGM battery in Group 48, which is what this car takes. Over a typical 4-to-7-year service life that works out to about $18-80 a year. A cheaper flooded battery is not a valid substitute here, whatever the shelf price tempts you into: the charging system is calibrated for AGM and will cycle a flooded battery in a way it is not built to survive.
This is not a one-off for Porsche: across the 2015-and-newer Porsche vehicles we hold specs for, 100% require an AGM battery. If you own a Porsche, assume AGM and budget accordingly.
See the full breakdown of what car batteries cost - by type, by make, and what the extras actually add.
This car needs the battery registered
Because this is a Porsche with an AGM battery, it almost certainly uses a smart charging system, which means the new battery has to be registered to the car. This is not optional housekeeping: skip it and the car keeps charging to the profile of the worn-out battery it thinks is still fitted, which will shorten the life of the new one. A shop or dealer does it in minutes, or an OBD-II tool that supports registration can do it in your driveway.
How battery registration works - what it does, and how to have it done.
What Group 48 means
A BCI group number describes the battery's physical size and terminal layout, not its power. It is what guarantees the battery drops into the tray and the cables reach the right posts. A Group 48 case measures roughly 278 × 175 × 190 mm. Standard-terminal layout.
Group 48 is one of the most common battery sizes on the road: it is the 1st most common of the 30 sizes across every vehicle we hold specs for, fitted to 21% of them. Every store stocks it, and you will never struggle to find one.
Some versions of this model year use Group 49 instead - a different engine, the hybrid or an option package can change the battery. The groups can be different case sizes, so match the group printed on the battery you are removing, and check the hold-down clamp engages before you drive off - a battery that shifts is a battery that fails early.
How many cold cranking amps?
Aim for 660 CCA at minimum. Cold cranking amps measure how much current the battery can deliver at 0°F, which is the one moment a battery is really tested. The 660-760 range reflects the different batteries fitted across this vehicle's trims and options. Going above the OEM rating is safe and does no harm - the starter draws what it needs and no more, so a higher-CCA battery is not "too strong" for the car. It is worth paying for if you park outside in a cold climate, and largely wasted money if you do not. Going below 660 is the one thing to avoid, because that is where hard winter starts come from.
How long it should last
An AGM battery typically lasts 4 to 7 years. Heat is what kills batteries, not cold - cold just exposes one that was already failing, which is why so many die on the first freezing morning after a hot summer. Short trips that never fully recharge it shorten its life too. Once this battery passes its third year, get it tested annually rather than waiting to be stranded.
The warning signs are worth knowing because they are easy to miss: cranking that sounds slower than it used to, headlights that dim at idle and brighten when you rev, or a car that starts fine every day until the first cold morning and then does not. A battery rarely warns you twice.
Frequently asked
What size battery does a 2015 Porsche 911 take?
The 2015 Porsche 911 uses a BCI Group 48 battery (some versions use Group 49), rated around 660-760 cold cranking amps.
Does the 2015 Porsche 911 need an AGM battery?
Yes - this configuration is fitted with an AGM battery from the factory, typically required on start-stop equipped trims.
How many cold cranking amps (CCA) does it need?
Aim for roughly 660-760 CCA. Choosing at or above the OEM rating is fine; going below can cause hard starts in cold weather.
Where is the battery located on a 2015 Porsche 911?
Check the engine bay first - that is where most vehicles carry the battery. Be aware that some models put it in the trunk or under a seat instead (many BMW and Mercedes-Benz models, plus the Chrysler 300 and Dodge Charger, among others), so if the engine bay has none, look there or in your owner's manual. Standard-terminal layout.
How much does a 2015 Porsche 911 battery cost?
Expect roughly $125-320 for an AGM battery in Group 48, which is what this car takes. Over a typical 4-to-7-year service life that works out to about $18-80 a year. A cheaper flooded battery is not a valid substitute here, whatever the shelf price tempts you into: the charging system is calibrated for AGM and will cycle a flooded battery in a way it is not built to survive.
Does a 2015 Porsche 911 battery need to be registered?
Because this is a Porsche with an AGM battery, it almost certainly uses a smart charging system, which means the new battery has to be registered to the car. This is not optional housekeeping: skip it and the car keeps charging to the profile of the worn-out battery it thinks is still fitted, which will shorten the life of the new one. A shop or dealer does it in minutes, or an OBD-II tool that supports registration can do it in your driveway.
How long should a 2015 Porsche 911 battery last?
An AGM battery typically lasts 4 to 7 years. Heat is what kills batteries, not cold - cold just exposes one that was already failing, which is why so many die on the first freezing morning after a hot summer. Short trips that never fully recharge it shorten its life too. Once this battery passes its third year, get it tested annually rather than waiting to be stranded.
Other vehicles that use Group 48
What to look for in a Group 48 battery + every car that uses it →Group 48 is one of the most common battery group sizes in the US.
More verified specs for your 2015 Porsche 911
Other vehicles that use a Group 48 battery
Group 48 is a common size, so the same battery fits many other vehicles - including: