The 2010 Acura TSX uses a standard 12-volt lead-acid car battery, and the most common replacement is a Group 35 battery with roughly 450–550 Cold Cranking Amps (CCA), depending on climate and vehicle condition. Verify the exact size and rating by checking the current battery label or the owner's manual before purchasing.
Battery type and size for the 2010 TSX
Understanding the basic specifications helps you choose a compatible replacement and avoid fitment or performance issues.
- Group size: 35 (also listed in some catalogs as H5) is the typical size used for the 2010 TSX.
- Battery type: Flooded lead-acid, maintenance-free, 12-volt battery. Most OEM replacements are sealed and do not require water addition.
- Cold-cranking amps (CCA): Generally in the 450–550 A range, with higher ratings preferred for colder climates.
- Reserve capacity (RC): Typically about 90–110 minutes for a standard flooded battery; this affects how long the car can run if alternator support is lost.
- Terminal layout and polarity: Standard positive/negative terminals; ensure the replacement’s terminal arrangement matches the current battery to fit cables and hold-downs.
For most drivers, a Group 35, 12-volt, maintenance-free battery with at least 450 CCA will satisfy the TSX’s needs. Always confirm the exact group size and CCA with the existing battery label or the vehicle’s manual.
Choosing and replacing the battery
When replacing the battery, consider factors such as climate, driving patterns, and whether you want standard maintenance-free performance or an extended-life option. The following details guide a safe, correct selection.
- Match the group size to 35; confirm the battery fits the tray, hold-down, and terminal locations on your car.
- Choose an appropriate CCA for your climate; winters may benefit from a higher CCA within the TSX’s recommended spec.
- Decide between standard flooded vs. AGM (absorbent glass mat) if you anticipate frequent deep discharges or auxiliary electrical loads; AGM offers longer life in some conditions but at a higher cost.
- Check the battery’s warranty and the supplier’s return policy in case of early failure or incompatibility.
- Ensure correct installation: disconnect negative terminal first, reconnect it last, and secure the battery with the hold-down bracket to prevent movement.
In practice, buying a Group 35, maintenance-free 12-volt battery with at least 450 CCA is a reliable baseline for the 2010 TSX. If your area experiences extreme cold, stepping up to a higher CCA within the recommended range is prudent.
Practical tips and care after replacement
After installing a new battery, perform a quick check to ensure optimal performance and longevity of your electrical system.
- Have the charging system tested to confirm the alternator is delivering proper voltage (about 13.8–14.4 volts when running).
- Make sure the battery terminals are clean and the connections are tight to avoid voltage drop or starting issues.
- Reset the vehicle’s electronics if needed (some models may require disconnecting the battery to reset certain modules).
- Schedule periodic checks for corrosion, electrolyte level (if applicable), and overall battery health, especially before winter.
Following these steps helps ensure your new battery performs reliably and lasts longer in everyday use.
Summary
For a 2010 Acura TSX, the typical replacement battery is a 12-volt, maintenance-free lead-acid battery in Group Size 35, with a CCA rating commonly between 450 and 550. Confirm the exact size and specifications on the current battery label or in the owner's manual, especially if you live in a very cold climate or have added electrical upgrades. When replacing, prioritize a proper fit, adequate CCA, and a solid warranty, and follow standard safety procedures during installation.