Electrical current, i, like Water-current is dependent on a lot of stuff.
Think of electricity as water, where voltage is the pressure that exists due to height of the water column above the point where you are taking it (known as "head" in fluid dynamics), and current is the flow-rate (just as you would think when you think of water current - not a coincidence water-current is flow rate). Invest in a thick pair of reasonably long jumper cables. Sidenote: If you're looking at one of those portable, "save yourself" units, don't buy it. I could use a smaller unit if my battery still had some juice. My truck battery says it produces 700 CCA so I can assume that I would need a jumper unit that can provide 700 amps or more if my battery is completely, hopelessly dead. The battery for your car is picked out by the engineers so it's cold cranking amps (CCA) number is bigger than the needed amps to start the engine. To start "bigger" vehicles you will probably need the 1000 amp unit. it won't start, but the interior lights come on, you can use a smaller jumper than if your battery was completely dead (and likely damaged).Ĥ00 amps is probably enough to start most small to midsize CARS and the smallest of SUVs and trucks. If your battery is only partly dead, i.e. If the starter needs more than those units can supply, the jumper will only provide its max. Your starter will "automatically" use as much as it needs up to the max. Those numbers are the max that they can supply.
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