Making a custom length battery cable takes a drill, mini-torch, crimper dies, flux, and solder.

We do lots of custom electrical work in the fab shop, and one job that seems to come up all the time is making custom battery cables. Trying to find ready-made cables that are exactly the right length is difficult at best, and damn near impossible for those extra-long cables when your battery has been moved to the trunk. Given the weight and cost of heavy gage copper cables  we make our own, using SAE-rated battery cable, and heavy-duty cable lugs to get exactly the right length.
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