CR2430 Key Fob Battery Guide: Specs, Fit and Replacement

The CR2430 is less common than the CR2032, so it is often not on the rack at the gas station when you need it. If your fob takes one, it pays to know the exact size and keep a spare at home.

This guide covers CR2430 specs, the vehicles most likely to use it, what you cannot substitute, and how to replace it.

What Is a CR2430 Battery?

The code is standardized across brands. “C” stands for lithium manganese dioxide chemistry, “R” for round, “24” for a 24 mm diameter, and “30” for a 3.0 mm thickness. Energizer sells it as ECR2430 and Duracell as DL2430, but they are the same size and chemistry.

Nominal voltage is 3.0V, and a fresh cell reads about 3.2-3.3V with no load. Typical capacity is around 270-300 mAh depending on the brand, which is more than a CR2032 and less than a CR2450. That extra capacity helps keyless fobs that wake up often.

CR2430 Specs at a Glance

Which Cars Use a CR2430 Key Fob Battery?

The CR2430 is used in a relatively small number of automotive fobs. The best-known group is Volvo:

• Volvo remote keys, roughly 2007-2018: Many fobs for the XC60, XC70, S60, S80, V60, and V70 from this era take a CR2430. Volvo’s own instructions for some of these models call for one CR2430 in the standard remote key.
• Volvo Personal Car Communicator (PCC): The optional PCC fob on some of these models uses two CR2430 cells. Replace both together.
• Newer Volvo keys on the SPA platform (XC90 from 2016 and later models) generally use a CR2032 instead, so do not assume CR2430 for every Volvo.
• Other makes: A handful of other fobs and aftermarket remote-start transmitters use CR2430. The only reliable way to know is to read the old battery.

For Volvo-specific opening steps, see our Volvo key fob battery replacement guide. For every other brand, start with the key fob battery size chart.

CR2430 vs Similar Batteries

The CR2450 is the most common wrong purchase because it shares the 24 mm diameter. It will not fit a CR2430 slot without forcing the case. If you want to know more about the larger cell, our CR2450 key fob battery guide covers it. For background on coin cell chemistry, see the lithium coin battery guide.

How to Confirm Your Fob Takes a CR2430

1. Read the old battery. The code is printed on the positive (+) face.
2. Check the owner’s manual under “remote control key” or “battery replacement.”
3. Measure it. About 24 mm wide and 3 mm thick means CR2430. About 5 mm thick means CR2450.

What You Need

• One CR2430 (two for a Volvo PCC fob)
• A small flat screwdriver or plastic pry tool
• A soft cloth to protect the fob finish

How to Replace a CR2430 Key Fob Battery

Steps vary by fob shape. On many Volvo remote keys of this era, the battery sits under a cover on the back of the fob.

1. Remove the emergency key blade if your fob has one. On many Volvo keys this releases or exposes the cover.
2. Open the cover or case with a small flat tool at the seam, working gently around the edge.
3. Note the battery orientation. Check which side faces up before removing it.
4. Remove the old cell without touching the circuit board with metal tools.
5. Insert the new CR2430 with the same orientation, handling it by the edges.
6. Close the case, reinsert the key blade, and test all buttons near the car.

On most vehicles, including Volvos of this era, a battery change does not erase the remote’s programming. If the fob still does not work, check polarity and contact tabs, then see key fob not working after battery replacement.

Signs Your CR2430 Is Running Low

A CR2430 holds its voltage well for most of its life, then drops off quickly. Watch for these early signs so you can swap it before it quits:

• You need to be closer to the car before lock and unlock respond.
• Buttons need two or three presses.
• Keyless entry or keyless start works only some of the time.
• The driver information display shows a key battery message.
• Problems are worse on cold mornings and improve when the fob warms up.

A fresh CR2430 reads about 3.2-3.3V on a multimeter. If yours reads below about 2.9V at rest, replace it. Our guide to key fob battery voltage explains how to read the numbers.

Buying and Storage Tips

• Stick with name brands such as Panasonic, Energizer, Duracell, Maxell, Murata, or Varta. CR2430 is a slower-selling size, so cheap no-name packs may be old stock.
• Check the date code or expiration date on the package. Lithium coin cells typically keep most of their charge for several years in storage, but fresher is better.
• Store spares at room temperature in the original packaging, not loose in a drawer where they can touch keys or coins.
• Keep coin cells away from children and pets. A swallowed coin cell can cause serious internal burns within hours.

When to Call a Dealer or Locksmith

A CR2430 swap is a simple DIY job. Call a pro if the fob case is cracked, the board shows corrosion, or a confirmed-good battery does not help. In 2026, replacing and programming a Volvo remote key typically costs a few hundred dollars at a dealer, and costs vary by model. If you are weighing that route, our guide to how to program a key fob explains what is DIY and what needs dealer tools.

Handling and Disposal

Touch the new cell only by its edges, since skin oils on the flat faces can add resistance at the contacts. Do not carry loose spares in a pocket with keys or coins, which can short the cell. When you remove an old CR2430, tape over both faces before recycling it at a battery drop-off; many hardware and electronics stores accept coin cells.

Frequently Asked Questions