I do not trust the presentation.
I wonder how well things will work when 19v is connected to the car.
I am guessing the box has a bunch of hobby grade Li-Po batteries that will catch on fire.
He's right nothing dodgy going on, we have a very similar jump pack at the garage where I work and I've used it a few times.
It's not designed to crank the car for any period just get enough power into the car to start it.
The 19v is probably a boost converter ours measures 12v on those clips probably 3 cells in series.
Ha probably so.
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What's the peak discharge current for lead acid batteries? 10C?
So with Lithium-Ion-Cells capable of 45C and even 90C for a few seconds these days, I guess it would be technically possible to do this correctly. However somehow I doubt that this thing for £59.95 has cells capable for doing this. Plus if you connect it to a flat battery AND start the engine, the battery will suck it's fair share as well.
I would have thought the thing in the positive lead cable is some over current protection maybe ... curious to see what would happen if you short the leads.
During the last few seconds of the video I suspect Photon was tapping the leads a little, but the bastard doesn't really show it
If the battery is totally flat I leave it connected for a minute to put some juice into the vehicle battery.
The thing in the positive lead is a bunch of schotky diodes probably to prevent the alternator charging the jump pack batteries when the car starts. I know this because they melted off the PCB when we were cranking a non running ford transit, a new a lead was needed! The clips are pretty poor by my standards, being made of plastic but seem to last ok. I don't think there's any over current protection.
I reckon max amps is around the 200 mark, ours will start any petrol engine and small (1.4-1.6) Diesel engines. It's been used it to start a couple of 2.0 diesels it cranked kinda slow but got them started easily enough.
If there's a underlying issue where the car won't start then this jump pack is no good. But if someone's left their lights on or if the battery is just too weak to start the engine then these come into their own.
So why bother might you say, what's wrong with a car battery and pair of jump leads?
Well convenience. I've had to carry a battery and leads 100yards around the back to get a motor going and it soon gets a chore. Plus customers are amazed when you pull this out your pocket and it gets their car going!