Larger vehicles such as vans and SUVs will need a higher cranking current, but even mid-range jump starters can turn over a 5L petrol or 3L diesel engine. A small car with a petrol engine will only draw about 300A of peak load, so an entry-level unit will suffice. The power needed to turn over the engine is referred to as cranking current. So, if you're planning to use your jump starter as a backup system for a range of vehicles, it's worth investing in a unit that is suitable for both 12V and 24V systems. Check out this buying guide to learn about the features you need to consider.Ĭars and motorbikes normally use a 12V electrical system, but boats and trucks need a 24V supply. Luckily, you can bail yourself out using a portable jump starter. This can often happen while you're out camping or on a road trip, because unless you have a dedicated house battery, you're likely to be using your car battery to power portable 12V devices. No matter how diligent you might be in making sure your car battery is in good shape, there is always a chance you might find yourself with insufficient charge to turn over the engine. Rescue your vehicle from a sticky situation with a portable jump starter
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