Hyundai Elantra 12V Battery Size and Replacement
The short answer
The surest way to find the right battery for a 2010 or 2014 Hyundai Elantra is to read the label on the battery already in the car and compare it with the owner's manual. Your replacement should match three things: the group size, the terminal layout and the cold cranking amps (CCA). This article does not name a specific group size for either year. No verified fitment data was available, and the answer can depend on the body style and market. Check the battery fitment for your exact vehicle before you buy.
One condition matters most. A 2010 Elantra and a 2014 Elantra come from different model generations. Do not assume a battery that fits one year will fit the other.
Why the 2010 and 2014 models need separate checks
The 2010 model year was the last year of an older Elantra generation. That year's lineup included the sedan and the Elantra Touring wagon. By 2014 the Elantra had been redesigned, and the range included the sedan, a coupe and the Elantra GT hatchback, with different engines across trims. Battery tray size, hold-down hardware and cable reach can change between generations and sometimes between body styles. For this reason, always look up fitment by model year, body style and engine, not by the Elantra name alone.
Gap to note: verified group sizes for each of these variants were not available for this article. If your car was sold outside North America, or a previous owner fitted a non-original battery, confirm against the manual or a dealer parts department, not just the current battery.
How to confirm the correct battery
Read the top or side label on the installed battery and note the group size, CCA rating and any reserve capacity figure. Check the battery section of the owner's manual for the factory-specified type and rating. Use a parts fitment lookup that asks for model year, body style and engine. Do not rely on a general Elantra listing. If the installed battery may not be original, compare its size with the tray and hold-down before treating it as the correct reference.
Specifications to match, explained
Specification | What it means | What to do; Group size | An industry code for the case dimensions and terminal placement | Match it exactly so the battery fits the tray and the hold-down clamps it securely; Terminal layout | Which side the positive and negative posts sit on | Match it so the cables reach without stretching and cannot touch the wrong post; Cold cranking amps (CCA) | How much current the battery can deliver to start the engine in cold conditions | Meet or exceed the original rating, especially in cold climates; Reserve capacity | How long the battery can power essential loads if charging stops | Use the original figure as a minimum if it is listed; Battery type | Conventional flooded or AGM (absorbent glass mat, a sealed design) | Use the type the manual specifies, or one the manual permits
Replacement basics
Battery replacement on most cars of this era is a common do-it-yourself job, but a few precautions apply. Turn off the ignition and all accessories first. Disconnect the negative cable before the positive, and reconnect in the reverse order: positive first, then negative. Refit the hold-down so the battery cannot move, and clean any corrosion off the cable clamps before you tighten them. Wear eye protection, because batteries contain corrosive acid and can release flammable gas.
After the swap, you may need to reset the clock and radio presets. If you are unsure whether your car needs any further reset after the battery has been disconnected, check the owner's manual. The supplied information did not cover this point for either model year. Most battery retailers accept the old battery for recycling. Don't throw it out with household waste.
Next step
Record the group size and CCA from your current battery, confirm them against the owner's manual for your model year and body style, then buy a battery that matches the size and terminal layout and meets or exceeds the cold cranking rating.