Author Topic: Battery disconnect / cut-off method  (Read 505 times)

Offline Angela

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Battery disconnect / cut-off method
« on: December 30, 2016, 04:45:42 PM »
Can anyone recommend a good way to disconnect the battery from a classic car when not in use? I'd like to have a way to keep the clock from not operating, yet I don't like connecting and disconnecting the battery frequently. I tried this from NPD, but IMHO it's a piece of junk: https://www.npdlink.com/store/products/master_cut_off_switch_battery_fits_on-142040-100494.html

Any suggestions?

Online 67gtasanjose

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Richard Urch

1967 (11/2/66, S.J.) Luxury Coupe, 289-4V w/Thermactor Emissions, C-4, Well Optioned
2005 (04/05) GT Premium Convertible, Windveil Blue, Parchment Top w/Med. Parchment interior,  Roush Body Appointments

Offline jwc66k

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Re: Battery disconnect / cut-off method
« Reply #2 on: December 30, 2016, 07:08:01 PM »
Try NPD - https://www.npdlink.com/store/?p=catalog&mode=newsearch&search_str=957-3&parent=0&year=0
I've used one of this type on my cars for years. For security, take the "screw" with you.
Jim
I promise to be politically correct in all my posts to keep the BBBB from vociferating.

Offline Building 3

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Re: Battery disconnect / cut-off method
« Reply #3 on: December 30, 2016, 07:24:40 PM »
I have used the "NPD Type" for many years.  I have bought mine at swap meets for $6.50 or 2 for $12.00.  There is usually a box of them at one or more venders. These are all made in China.  I did have one go bad after a few years. When I compared it to the others I had, it was oxidized while the others where nice and shiny, like new.  It must have been a bad batch of metal that they used.  Other than that, they have been fine.
1966 289 C code auto convertible December 1965 scheduled build at Dearborn.

1966 289 C code auto convertible
October 1965 scheduled build at Metuchen.

Offline bgp429

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Re: Battery disconnect / cut-off method
« Reply #4 on: December 31, 2016, 01:09:05 AM »
Most disconnect switches have a voltage drop. Modern batteries are designed for 14.5 -15 V. Our old vehicles [on a good day] produce 13.5-14v. Add a .5-1V drop across a disconnect switch you see the problem.  What i do is leave one cable slightly loose and when not in use remove it. I do this for 3 reasons, not powered up in the garage, no parasitic drain on the battery and no additional resistance. Just have to open the hood.

Offline gjz30075

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Offline Bob Gaines

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Re: Battery disconnect / cut-off method
« Reply #6 on: January 16, 2017, 10:36:00 PM »
I found this one to be much better than the Chinese ones
https://www.amazon.com/Post-Battery-Master-Disconnect-Switch/dp/B001N729FS/ref=sr_1_1?ie=UTF8&qid=1484614819&sr=8-1&keywords=battery+cutoff+switch
I like the fact it seems to indicate it is US made (hope the parts are US ). What about this one besides the US flag seems to you to be any better.
Bob Gaines,Shelby enthusiast, Shelby collector , Shelby concours judge SAAC,MCA,Mid America Shelby

Offline gjz30075

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Re: Battery disconnect / cut-off method
« Reply #7 on: January 17, 2017, 05:57:46 AM »
Bob, I found the metal clamp to be a harder material, so putting some decent clamping force on the post doesn't distort the 'clampers', as bad.   Also, I've had
green knob ones strip its threads at the connect/disconnect end, due to really soft metal, or improperly made threads, and wouldn't make the electrical connection.

Offline Bob Gaines

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Re: Battery disconnect / cut-off method
« Reply #8 on: January 17, 2017, 02:15:22 PM »
Bob, I found the metal clamp to be a harder material, so putting some decent clamping force on the post doesn't distort the 'clampers', as bad.   Also, I've had
green knob ones strip its threads at the connect/disconnect end, due to really soft metal, or improperly made threads, and wouldn't make the electrical connection.
Good to know . A shame that seller doesn't rely those details too. Thank you
Bob Gaines,Shelby enthusiast, Shelby collector , Shelby concours judge SAAC,MCA,Mid America Shelby

Offline Ralf

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Re: Battery disconnect / cut-off method
« Reply #9 on: January 17, 2017, 02:37:24 PM »
I found this one to be much better than the Chinese ones
https://www.amazon.com/Post-Battery-Master-Disconnect-Switch/dp/B001N729FS/ref=sr_1_1?ie=UTF8&qid=1484614819&sr=8-1&keywords=battery+cutoff+switch

Hi, I'm interested as well, but Amazon US will not ship to GER (Sorry, this item can't be shipped to your selected address.)
Could someone buy this for me and ship to GER?
Of course I gonna pay via PAYPAL (to friends, no fees).
Would be nice.
Or is there another source available?
Thx
Ralf
« Last Edit: January 18, 2017, 05:47:22 AM by Ralf »
1967 Convertible 289 GTA Nov 30 1966, SJ
Pictures: https://mustang-cabrio-67.jimdo.com/mustang-1967-impressionen