Restoring - General discussions that span across many different groups of years and models > Misc Items
Battery disconnect / cut-off method
Angela:
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?
67gtasanjose:
http://www.ebay.com/itm/WirthCo-20108-Battery-Doctor-Knife-Switch-for-Top-Post-Batteries-/132048503818?hash=item1ebeb4440a:g:X3AAAOSwt5hYZWsg&vxp=mtr
jwc66k:
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
Building 3:
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.
bgp429:
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.
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