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Lithium Ion jump starters

It's an 18 Ah battery. A 12V air compressor (you're not trying to power a 110V model, right?) probably draws 15A or so, which is well within the capabilities of that battery to provide. Since Li-ion doesn't have much of a discharge rate effect on capacity, I'd expect that you could get a bit over an hour of use out of it. Certainly enough to top off your tires.
 
does your air compressor not come with a cigarette lighter plug for a power source? Or did you mean a larger pancake compressor?
 
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jagec said:
It's an 18 Ah battery. A 12V air compressor (you're not trying to power a 110V model, right?) probably draws 15A or so, which is well within the capabilities of that battery to provide. Since Li-ion doesn't have much of a discharge rate effect on capacity, I'd expect that you could get a bit over an hour of use out of it. Certainly enough to top off your tires.
Click to expand...

Yeah its a VIAIR 88p 12v compressor. 20 amp max
 
rh71 said:
What's wrong with using the car battery since that's what they intended? Did you mean you wanted the jump starter to double as a power source for your compressor?
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Yeah. Instead of popping the hood of every car ( i like to top them off all at once).
 
jagec said:
It would take almost 4 days to fully charge that battery using a standard 500 mA USB supply.
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Most jump-starter packs have extremely slow chargers anyway. Mine has 700 mA of output, and yes, it can take days to bring up the battery by a few volts.
 
brainhulk said:
http://www.amazon.com/gp/product/B00...=A8Y9N35ANEOVV

anybody use one of these?

would it be enough juice to power my air compressor to top off tires?
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Yes. It will also jump start your car, or truck several times between charges.

I bought the same brand a year ago - the Mp3 model (stupid model name). I've had to jump my bike out on the road with it once and it jumped my neighbor's SUV. I bought it for it's size to keep in my tour kit on the bike and I'm actually getting ready to buy another one or two for our other vehicles.
 
thomsbrain said:
Most jump-starter packs have extremely slow chargers anyway. Mine has 700 mA of output, and yes, it can take days to bring up the battery by a few volts.
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If you run them down... Mine didn't take long to top off out of the box and after jumping a vehicle it topped off in under an hour or there about.
 
WackyDan said:
If you run them down... Mine didn't take long to top off out of the box and after jumping a vehicle it topped off in under an hour or there about.
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Yeah, I use mine as a mobile air compressor and power source for phone charging at the racetrack, so it mostly sees sustained power draws.

If you use one to jump a car, it is immediately getting a huge recharge until you actually pull off the jumper cables. 🙂
 
thomsbrain said:
Yeah, I use mine as a mobile air compressor and power source for phone charging at the racetrack, so it mostly sees sustained power draws.

If you use one to jump a car, it is immediately getting a huge recharge until you actually pull off the jumper cables. 🙂
Click to expand...

I don't think it would accept a huge recharge rate. It's probably protected from that.
 
WackyDan said:
Then you lose the portability.

Those L-ION ones are small, come with USB ports and adapters, and some come with a plug to charge from a 12v port. They also hold a charge longer between top offs.
Click to expand...

I'm not sure how the L-ion devices would power the 12V 20A compressor, though. I doubt any 12V accessory ports will supply anywhere near 20A.

The compressor has battery clips only, because of it's high power draw.

You'd have to clip the battery clips together, and then hope the jump starter will turn on. Or use the "emergency mode" for when it does not detect a battery.

With the small lead acid battery, you can attach a handle, clip the compressor leads on to the terminals and go from car to car.

The battery is only 7 x 3 x 6.5 inches, so it's not very big.
 
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