Dual Battery Isolator Schematic

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After answering numerous questions about different battery isolator schemes, I decided it would be easier to just build a webpage that shows a dual battery isolator schematic. Below you will find the basic design of 3 types of battery isolators with the pros and cons of each. Note: I received an email from someone scolding … Read more

Battery Cable Terminal Ends: Top Post, Side Post, Elbow or Flag

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Below is a brief description of the different types of battery cable terminal ends to help you choose exactly what will work best for you.

Battery Terminals:

Straight Top Post:
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This is the most common battery terminal and probably what you think of when we talk about battery cable ends. They come in a large variety of sizes from 6 gauge to 4/0 gauge.  The terminals we sell are die-cast solid copper with tin plating for corrosion resistance.

Elbow Top Post Battery Terminal:
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These are available in Right or Left.  They are useful in certain applications where space is a concern or if you want a different look. (Left elbow shown). Elbow terminals are a little more expensive (about $1 more).

Elbow Top Post Battery Terminal:
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These are available in Right or Left.  They are useful in certain applications where space is a concern or if you want a different look. (Left elbow shown). Elbow terminals are a little more expensive (about $1 more).

Side Post or Stud Top Terminals:
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These are the heavy-duty replacement for the cable ends used by some OEMs on new cars and for stud top industrial batteries. 

Side Post or Stud Top Terminals:
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These are the heavy-duty replacement for the cable ends used by some OEMs on new cars and for stud top industrial batteries. 

Terminal Sizes:

Not every terminal is available in every wire gauge.  For example, 6 gauge elbow terminals are not available. Here is a table with what we normally stock (“Yes”); what we can order special order (SO);  and what is hard to find (“No).

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Ring Terminals:

Ring Terminal or Lug:
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This is what you need to connect o the starter, solenoid, alternator or deep cycle battery. A heavy-duty end is shown. The metal used in the heavy-duty ends is twice as thick. The HD ends are also wider and more expensive. As lugs get larger, more copper is required to make them, therefore they cost more.

Elbow Top Post Battery Terminal:
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Heavy-duty ring terminals are also available with a 45 degree or 90-degree bend.  Not all sizes are available. These terminals are more expensive than the normal heavy-duty lugs. I do NOT recommend trying to make your own bent ends. I have tried and very often the ends will crack possibly leading to premature failure.

Ring Terminal Sizes:

Not every hole size is available with every wire gauge. For example, 4/0 gauge lug with 1/4 holes is not something we stock and can be very hard to find. Here is a table with what we normally stock (“Yes”); what we can special order (“SO”) and what is not available (“NA”). We try to stock all sizes up to 3/0.  We don’t stock much 4.0 due to low demand.

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We carry a wide range of battery terminals.