Standard size battery post? - JeepForum.com
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post #1 of 5 Old 04-06-2020, 11:53 AM Thread Starter
Reiver635
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Wj Standard size battery post?

What size are standard US size battery terminals?

I ask because the clamps on my UK WJ (or more correctly WG) are crushed right down before they grip the terminals on the current battery. The nut is so buried in the clamp it's hard to get a grip on it.



I believe Standard UK battery posts are (at the base of the tapered terminal) 17.5mm for the negative post and 19.5mm for the positive terminal. Are US battery posts larger? Are they tapered or straight?

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post #2 of 5 Old 04-06-2020, 12:36 PM
jtpeters
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Found this info on the net:

Traditional top posts are usually referred to as SAE posts.
There's an SAE spec for this, published and apparently unambiguous, calling for a 1:9 taper.
Positive: A top post size of 17.5mm
Negative: A top post size of 15.9mm

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post #3 of 5 Old 04-06-2020, 12:44 PM
jtpeters
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Perhaps you're using Type A1 / A2 type Battery Cable on SAE/JIS type battery terminals?
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Automotive  Battery Terminal Types.jpg  
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2004 Jeep Overland WJ 4.7 H.O. (Bought new in Oct 2003)
2014 Jeep Overland WK2 5.7 Hemi (Bought used in 2016 w/7k miles)
1970 Ford Mustang Boss 302 (in Family since 1974)
2013 Ford Mustang Boss 302
2011 BMW 328i
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post #4 of 5 Old 04-06-2020, 02:47 PM Thread Starter
Reiver635
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Wj

In this case it looks like UK/DIN posts are actually larger than the US SAE posts.

Since the WG version was built in Austria it may well have DIN size clamps.

The clamps have obviously distorted over time so they may well need replacing at some point.

Thanks for your help.
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post #5 of 5 Old 04-06-2020, 03:01 PM
Bigrigr
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If you take a die grinder, or a swazall, or even a hacksaw, you can trim a little of each side of the clamp(where the bolt goes through) where they meet in the middle, and make it squeeze down a little better.

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