2027 Toyota Prius Battery Size

GarageDex's verified fitment data shows the 2027 Toyota Prius uses a BCI Group H4 battery, rated about 540-640 cold cranking amps (Varies).

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Key takeaways

Battery: BCI Group H4, 540-640 CCA, Varies.
Replace with the same Group H4.
In cold weather, choose a battery at or above 640 CCA.
It comes with a flooded battery; you can upgrade to AGM in the same group size.

BCI Group SizeH4The case-size code that sets the physical fit and terminal layout.Pending verification

Battery type (OEM): Varies by factory option
Cold cranking amps (CCA): 540-640
Terminal position: Standard-terminal layout
Dimensions (L×W×H): 207×175×190 mm

2027 carries over from 2026: Car and Driver (2026-07-20) describes the 2027 Prius as a carryover of the 2026 model. The current generation dates from 2023, so the 2025 data applies. The EPA lists no new engine for 2027. Spec carried from GarageDex's sourced 2025 data - confirm in your 2027 owner's manual. Always confirm against your owner's manual or current battery label.

Pending verificationLast checked 2026-10-23Confidence: medium - cross-checking in progress

Sources: Toyota TrueStart 2025 (PDF): "2016-2022 ZVW50, 51 (2ZRFXE) H4 (LN1)", "2019-2022 ZVW55 (2ZRFXE) H4 (LN1)", "2023- MXWH60, 65 (M20AFXS) H4 (LN1)", Toyota TrueStart 2024 (PDF): "2016- ZVW50, 51 (2ZRFXE) H4 (LN1)", Car and Driver, Generation history (caranddriver.com), EPA fuel economy listing (2027 engines)

Data maintained by Matan B., who runs GarageDex, and checked against manufacturer and retailer fitment data (how we verify). Specs are for US and Canada-market vehicles; the same model sold in the UK, Europe or Australia can use different parts.

The EPA lists automatic engine start-stop on every 2027 Toyota Prius configuration. Start-stop restarts the engine many times per drive, which is why these cars take an AGM or EFB battery - replace like with like. Start-stop by engine →

It comes with a standard flooded battery. You can usually step up to an AGM in the same Group H4 for longer life, but it isn't required. A 540-640 CCA rating is typical for this class. Matching or slightly exceeding the OEM figure is fine; going below it risks hard starts in winter. Group H4 defines the case size and terminal layout (standard-terminal layout), so any reputable Group H4 battery will fit the tray and connect correctly.

The right battery for your 2027 Toyota Prius

Match the group size (Group H4) and aim for at least 540 CCA - more in cold climates. A standard flooded battery is fine, or upgrade to AGM for longer life. 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:

Best exact-fit replacementGroup H4, 540-640 CCA, VariesShop Group H4 Best for cold climatesGroup H4, at or above 640 CCAShop Group H4 Best upgrade (AGM)AGM Group H4 for heavy loads and heatShop Group H4

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Jump starter and charger for the 2027 Toyota Prius

Of the engines offered on the 2027 Toyota Prius, the 2.0L 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 2.0L 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.

Jump starter that covers itNOCO Boost GB20, 500A peak Same size, other brands500 amp jump starter Maintainer for storage1-amp smart maintainer, any car battery Charger for a flat battery5-amp smart charger, up to 120 Ah

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 2027 Toyota Prius battery cost?

The price depends on which battery option this car has: roughly $80-200 for a standard flooded battery, $200-235 for EFB, and $125-320 for AGM. Check the label on your current battery and buy the same group and type.

That is typical for Toyota: only 6% of the 2015-and-newer Toyota vehicles we hold specs for use AGM, so you are usually in the cheaper flooded bracket with this brand.

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

The battery type on this car depends on its factory option. If the battery you are removing is labeled AGM or EFB, the car has a smart charging system and the new battery should be registered to it, which a shop, a dealer, or an OBD-II tool that supports registration does in minutes.

How battery registration works - what it does, and how to have it done.

What Group H4 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 H4 case measures roughly 207 × 175 × 190 mm. Standard-terminal layout.

Group H4 is one of the less common sizes, at 0.6% of the vehicles we hold specs for. It is still a catalogued BCI size rather than anything exotic, but a smaller store may need to order it, so it is worth calling ahead.

Every vehicle that takes a Group H4

How many cold cranking amps?

Aim for 540 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 540-640 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 540 is the one thing to avoid, because that is where hard winter starts come from.

Can you use a higher-CCA battery?

How long it should last

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 2027 Toyota Prius take?

The 2027 Toyota Prius uses a BCI Group H4 battery, rated around 540-640 cold cranking amps.

Does the 2027 Toyota Prius need an AGM battery?

It depends on the factory battery option. Check the label on the battery you are removing: if it says AGM or EFB, replace it with the same type, because the charging system is set up for it.

How many cold cranking amps (CCA) does it need?

Aim for roughly 540-640 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 2027 Toyota Prius?

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 2027 Toyota Prius battery cost?

Does a 2027 Toyota Prius battery need to be registered?

How long should a 2027 Toyota Prius battery last?

Most batteries last three to five years.