Thread: Warm air intake
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Old 04-24-2017, 01:07 PM   #59 (permalink)
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Originally Posted by Stubby79 View Post
I have one of those jump packs. I haven't had to use it yet. We were just discussing them on another forum...the one guy who had tried using his, well, it wasn't strong enough to boost his car, even though the main battery wasn't completely dead. So I wouldn't count on it for doing much more than boosting a battery that can almost turn the car over already. I suppose you could throw in some super capacitors, but now you're getting more and more complicated.
Regarding this...

I still haven't had to jump start a car with mine, but I came up with the idea to load-test the jumper pack with my(cheap) car battery load tester. It's supposed to be a 100a load at 12v. Hooked up to the jump pack, the voltage sagged down t 8.0v with the load on. which would mean the amperage would have dropped as well, down to ~66a.

That won't start a car by itself. As I said before, it might be enough in parallel with your half dead car battery to get it to turn over.

Hope that's some useful feedback on these little jump-packs.

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