If they started to smoke even before you tried to start the vehicle with the flat battery, the connection was wrong but there is a possibility that the vehicle that wanted to be jumped has a short somewhere in its engine bay if they only started smoking once starting attempt commenced, jumper cables were too thin/bad quality and can’t handle the amps.Ī good practice to remember when jumping a vehicle with a very flat battery is to connect the jumpers and then let the donor vehicle idle for a couple of minutes (you can raise the revolutions up a little with the accelerator) before you try to start the vehicle you want to be jumped, this way you give the flat battery little charge time increase before starting attempt commences. Did the jumpers start to smoke and melt just after you connected them or only after you tried to start the vehicle with the flat battery?ģ. Normal wire cable can’t handle that kind of power transfer… unfortunately, commercial jumper cables often times have double the weight/thickness because smaller cheaper sets can’t handle the amount required.Ģ. Jumper cables are transferring large amounts of current in quick succession. You either connected the jumpers wrong and caused a short or you have a low-quality set of jumpers. (This whole box is a button! Click anywhere! Why Do Jumper Cables Get Hot?Ī great question! To answer it, we can look at a couple of different factors that can lead to overheating.ġ.
JUMPER BURNIN RUBBER 3 HOW TO
But, first, finish reading this article so you know what to expect and how to safely use your new jumper cables. If you need a new set of jumper cables you need to check out my buying guide. Then instead of one dead car battery, you have two dead car batteries, not the ideal situation. However, leaving the jumper cables on for too long can cause a drain on the good battery. Jumper cables can be a lifesaver in a pinch and it can be tempting to try and jump-start your vehicle for longer than the suggested 3 minutes, hoping that leaving the cables connected for a longer period of time will get the battery jump-started. While you can’t do any harm to your vehicle by leaving the jumper cables attached for a couple of minutes, it’s probably best not to leave them on too long. Doing so can lead to having your battery overcharged, which can cause permanent damage and lead to needing a new battery or alternator.
I would go with the more conservative approach of not leaving your vehicle running unattended with jumper cables still attached for too long. It can be tempting to leave jumper cables connected for hours, but can you actually do that without damaging the car battery? It turns out that this is not recommended.
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