Car Battery Terminal Size Chart
Compare common T1, T2, T4-F and T4 battery terminal types before choosing or fitting a replacement battery.
Battery Terminal Reference
Use this diagram as a visual guide when comparing the terminals on the existing battery with a proposed replacement.
Checks to Make Before Fitting
Terminal size is only one part of battery compatibility. Confirm all of the following before ordering or installing a battery.
Terminal position
Check which side the positive and negative terminals sit on when the battery faces you.
Terminal type
Compare the terminal shape and diameter so the cable clamps can make a secure connection.
Case and hold-down
Confirm the battery dimensions, overall height and the correct base or securing arrangement.
Battery specification
Match the required technology, capacity and cold-cranking rating for the vehicle.
A battery with the terminals in the opposite position may leave the vehicle cables unable to reach safely. Never stretch, cross or force battery cables into place.
What if the terminals look similar?
Do not assume they are interchangeable. Small differences in size or layout can prevent a secure connection and may cause starting or charging problems.
Does terminal orientation matter?
Yes. Batteries with the same case dimensions can place the positive terminal on opposite sides, making one version unsuitable for the vehicle.
Need Help Confirming the Correct Battery?
Call or message us with the registration and vehicle details so we can check the required specification and terminal layout.