9 min readPublished 30 March 2025
Car battery size codes (like 096, 027, 110) indicate physical dimensions and are standardized across manufacturers. Finding the right battery size for your vehicle ensures proper fitment in the battery tray.
This comprehensive guide provides a complete UK car battery size chart, explains battery codes and dimensions, helps you identify your vehicle's battery size, and covers terminal layouts and other fitment considerations.
Quick Answer
Common UK battery sizes include 096 (most popular, 278×175×190mm), 110 (353×175×190mm), 027 (242×175×190mm), and others. Size codes indicate physical dimensions. Always match size code to ensure battery fits your vehicle's battery tray. Use our Battery Fitment Tool to find your exact requirements.
Common causes
- -Not checking battery size code before purchasing
- -Assuming all batteries are the same size
- -Not verifying physical dimensions match battery tray
- -Not checking terminal layout (positive/negative position)
Typical fixes
- -Check existing battery label for size code (096, 110, etc.)
- -Use Battery Fitment Tool to identify exact battery size for your vehicle
- -Verify physical dimensions match battery tray before purchasing
- -Check terminal layout matches (positive left vs right, top vs side terminals)
Common UK Battery Sizes
Most common UK size
Likely cause: 096 battery (278×175×190mm)
Next step: Check your existing battery or use fitment tool to confirm
Larger vehicle or van
Likely cause: 110 battery (353×175×190mm) or larger
Next step: Check vehicle handbook or existing battery for size code
Smaller vehicle or compact car
Likely cause: 027 battery (242×175×190mm) or smaller
Next step: Verify size code matches your vehicle requirements
Not sure of battery size
Likely cause: Use Battery Fitment Tool or check existing battery
Next step: Enter vehicle details in fitment tool for exact specifications
What Are Battery Size Codes?
Battery size codes (like 096, 110, 027) are standardized numbers that indicate physical dimensions. They're used across manufacturers to ensure batteries fit specific vehicle battery trays.
The size code doesn't indicate capacity or technology type - it only refers to physical dimensions. A 096 battery can be standard flooded, EFB, or AGM, and can have different capacities (Ah) and CCA ratings.
UK Car Battery Size Chart
This chart shows common UK battery sizes with their dimensions. Always verify the exact size for your vehicle using the Battery Fitment Tool or your vehicle handbook.
- 096: 278mm × 175mm × 190mm (most common UK size, used in many cars and vans)
- 110: 353mm × 175mm × 190mm (larger vehicles, some vans, higher capacity)
- 027: 242mm × 175mm × 190mm (smaller vehicles, compact cars)
- 075: 242mm × 175mm × 175mm (compact vehicles, lower profile)
- 063: 242mm × 175mm × 190mm (small vehicles, similar to 027)
- 100: 353mm × 175mm × 190mm (large vehicles, similar to 110)
- 115: 353mm × 175mm × 190mm (large vehicles, commercial use)
096 Battery (Most Common UK Size)
The 096 battery is the most popular size in the UK, used in many cars and vans. It measures 278mm × 175mm × 190mm and is available in all battery technologies (standard, EFB, AGM).
- Dimensions: 278mm (length) × 175mm (width) × 190mm (height)
- Most common UK battery size
- Used in many cars, vans, and commercial vehicles
- Available in standard flooded, EFB, and AGM technologies
- Capacity typically 60-80Ah depending on technology and brand
See also: Best AGM 096 battery options
How to Find Your Vehicle's Battery Size
Several methods help you identify the correct battery size for your vehicle.
- Check existing battery label: Size code (096, 110, etc.) is usually prominent on battery label
- Use Battery Fitment Tool: Enter vehicle registration or make/model for exact specifications
- Check vehicle handbook: Battery specifications are usually listed
- Measure existing battery: If label is missing, measure dimensions and match to size chart
- Consult dealer or garage: Professional fitment guides have exact specifications
Battery Terminal Layouts
Battery terminals can be arranged in different positions. The positive and negative terminals may be on the left or right side, and terminals can be on top or on the side of the battery.
- Terminal position: Positive and negative can be left or right (check existing battery)
- Terminal type: Top terminals (most common) or side terminals (some vehicles)
- Terminal size: Different sizes (thin post, thick post) - ensure clamps fit
- Always match terminal layout to original battery - wrong layout means battery won't fit
- Check terminal orientation before purchasing - some vehicles have specific requirements
Battery Hold-Down Requirements
Batteries are secured in the battery tray using hold-down mechanisms. Different vehicles use different methods.
- Bracket hold-down: Metal bracket clamps battery from top
- Bolt-through hold-down: Bolt secures battery through base
- Strap hold-down: Strap wraps around battery
- Ensure replacement battery has compatible hold-down points
- Some batteries have different hold-down configurations - check before purchasing
Capacity and CCA Within Size Code
Within the same size code, batteries can have different capacities (Ah) and CCA ratings. Always match or exceed original specifications.
- Same size code can have different capacities (e.g., 096 batteries range from 60-80Ah)
- Match or exceed original battery capacity (Ah)
- Match or exceed original CCA rating
- Higher capacity/CCA is usually fine if physical dimensions fit
- Lower capacity/CCA may not provide sufficient power
Common Battery Size Mistakes
Avoiding these common mistakes ensures you get a battery that fits correctly.
- Assuming all batteries are the same size
- Not checking size code before purchasing
- Not verifying physical dimensions match battery tray
- Not checking terminal layout (positive/negative position)
- Not considering hold-down mechanism compatibility
- Choosing wrong size to save money (battery won't fit)
Using the Battery Fitment Tool
Our Battery Fitment Tool simplifies finding the correct battery size by identifying exact requirements based on your vehicle details.
- Enter vehicle registration number for automatic lookup
- Or select vehicle make, model, and year manually
- Tool identifies battery size code, capacity, CCA, and technology type
- Shows compatible batteries with current prices
- Eliminates guesswork and ensures correct selection
Special Fitment Considerations
Some vehicles have special battery requirements beyond standard size codes.
- Vented batteries: Some vehicles require vented batteries (battery produces gas that must be vented)
- Battery location: Some vehicles have batteries in boot or under seats (check access requirements)
- Battery Management System: Start/Stop vehicles may require BMS registration after battery replacement
- Terminal adapters: Some vehicles may need terminal adapters for different terminal types
- Always check vehicle-specific requirements in handbook or with dealer
AI-Friendly Summary
- Common UK battery sizes include 096 (most popular), 110, 027, and others - size codes indicate physical dimensions.
- Always match battery size code to ensure proper fitment - wrong size means battery won't fit in tray.
- Check terminal layout (positive/negative position) and hold-down mechanism compatibility.
- Use Battery Fitment Tool to identify exact battery size, capacity, and CCA for your vehicle.
- Within same size code, batteries can have different capacities and CCA - match or exceed original specifications.
Frequently Asked Questions
What battery does my car use?
To find what battery your car uses, check the existing battery label for the size code (096, 110, 027, etc.), technology type (AGM/EFB/standard), capacity (Ah), and CCA rating. You can also use our Battery Fitment Tool with your vehicle registration number, check your vehicle handbook, or consult a professional. The battery specification is specific to your vehicle's make, model, year, and engine type.
What battery size do I need for my car?
Battery size depends on your specific vehicle. Check your existing battery label for the size code (096, 110, 027, etc.), use our Battery Fitment Tool with your vehicle registration, or check your vehicle handbook. The most common UK size is 096 (278×175×190mm), but your vehicle may require a different size.
What does battery size code 096 mean?
Battery size code 096 indicates physical dimensions: 278mm (length) × 175mm (width) × 190mm (height). It's the most common UK battery size, used in many cars and vans. The code doesn't indicate capacity or technology - a 096 battery can be standard flooded, EFB, or AGM with different capacities.
Can I use a different size battery?
No, you must use the correct battery size for your vehicle. Batteries are designed to fit specific battery trays, and wrong size batteries won't fit physically. Using wrong size can cause damage, poor connections, and safety issues. Always match the size code to your vehicle's requirements.
How do I find my car's battery size?
Find your battery size by checking the existing battery label (size code like 096, 110 is usually prominent), using our Battery Fitment Tool with your vehicle registration, checking your vehicle handbook, or measuring the existing battery dimensions and matching to the size chart. The Battery Fitment Tool is the easiest method.
What's the difference between battery sizes?
Battery sizes differ in physical dimensions (length × width × height). Larger sizes (like 110) are longer and typically have higher capacity, while smaller sizes (like 027) are more compact. The size code ensures the battery fits your vehicle's battery tray. Within the same size, batteries can have different capacities and technologies.
