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What is a battery positive terminal?

Updated: 10/25/2022
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14y ago

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recent years, the most common design was the SAE Post, consisting of two lead posts in the shape of truncated cones, positioned on the top of the battery, with slightly different diameters to ensure correct electrical polarity.

The "JIS" type is similar to the SAE but smaller, once again positive is larger than negative but both are smaller than their SAE counterparts. Most older Japanese cars were fitted with JIS terminals. Cohomer dot com webiste, show more battery terminals, the positive terminal inner size is larger than the negative terminal, with about 0.1-0.5cm.

General Motors, and other automobile manufacturers, have also begun using side-post battery terminals, which consist of two recessed female 3/8" threads (SAE 3/8-16) into which bolts or various battery terminal adapters are to be attached. These side posts are of the same size and do not prevent incorrect polarity connections.

L terminals consist of an L-shaped post with a bolt hole through the vertical side. These are used on some European cars, motorcycles, lawn and garden devices, snowmobiles, and other light duty vehicles.

Some batteries sizes are available with terminals in many different configurations, but two main configurations are:

positive on left and negative on right corner

negative on left and positive on right corner.

Terminals can also be both on the long or short side of the battery, or diagonally opposed, or in the middle. Purchasing the wrong configuration may prevent battery cables from reaching the battery terminals.

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3y ago
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14y ago

The positive terminal on a battery is the one with the + sign on it. Sometimes it is painted red.

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