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Battery terminals


LarryH57
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I bought a vehicle battery and the negative terminal was smaller than the positive. That meant that the connector on the negative was still loose even with the securing ring tightened to its maximum point. I could just pull it up and off. After a test drive it was nearly off the terminal. If i use copper, lead or steel to wrap around the battery to allow the negative lead to fix tightly, are there conductive metals to avoid?

And BTW why are negative terminals on new batteries smaller than the positive ones?

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On 7/3/2021 at 10:35 PM, LarryH57 said:

I bought a vehicle battery and the negative terminal was smaller than the positive. That meant that the connector on the negative was still loose even with the securing ring tightened to its maximum point. I could just pull it up and off. After a test drive it was nearly off the terminal. If i use copper, lead or steel to wrap around the battery to allow the negative lead to fix tightly, are there conductive metals to avoid?

And BTW why are negative terminals on new batteries smaller than the positive ones?

To make them identifiable as +ve or -ve .and less likely to be mixed up.

That is what I was told when I did a Plant course at Chatham back in 1978

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Posted (edited)

Thanks Lex,

Its been a while since I had to change a battery on a car; in this case my mothers which had not been driven for months. Incidentally it was from Halfords whereas the battery on my Lwt has been on there for years and works fine even if usage was low during lockdown! Its a Duccelier battery.

Edited by LarryH57
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