Car battery jumper pack spec

[Tom_GGG]

Ive got a couple of cars, smallest engine is a 1.4L 59 plate ford fiesta. The largest is a 4.7L Aston martin V8 Vantage 59 plate.

Im looking to buy a car battery jumper pack, the type that you can plug in and charge inside then use to jump a flat battery.

I understand from reading online not all battery packs will work with all cars, could someone recommend a car jumper pack that will work for the 2 above cars and a few others in between in size ?

I found this one online, would this be suitable ? https://www.amazon.co.uk/gp/product/B01BEZV0IA/ref...

Edited by Tom_GGG on Sunday 9th December 18:23

Edited by Tom_GGG on Sunday 9th December 18:24

[E-bmw]

I have no idea why a pack would "not work with all cars" aside of the obvious (is it powerful enough to turn the engine over) so, as this one says 6.5 litre petrol engine, it should be fine although I have no experience of these packs personally.

My only advice would be to get the best spec you can & stay with well known brands & don't expect the earth with respect to time it will turn the engine over for if the car is difficult to start.

Reviews on Amazon etc are always a good start for research like that.

[227bhp]

https://www.pistonheads.com/gassing/topic.asp?t=17...

[Squishey]

By the looks of things the Vantage requires a battery will a Cold Cranking Amps of 800-850A, so I would get a jump starter with at least this capability. The Fiesta needs about half that.

Those numbers came from the Varta website.

[Penelope Stopit]

There is nothing that betters heavy duty jump leads

[DuraAce]

Penelope Stopit said:

There is nothing that betters heavy duty jump leads

Perhaps so but they aren't much use if you haven't got a second vehicle available.

I use one of these

https://www.amazon.co.uk/dp/B015TKUPIC/ref=asc_df_...

Often have to leave the car for a few months at the airport, its never failed to start mine or colleagues cars. Worth it's weight in gold on a cold winter morning when you've a flat battery.

[GreenV8S]

DuraAce said:

I use one of these

https://www.amazon.co.uk/dp/B015TKUPIC/ref=asc_df_...

I've never used those but I'm skeptical about the claims for them.

Even allowing for the higher energy density of Lithium compared to lead-acid, it's clear from the size that they have a relatively small capacity. My back-of-the-napkin arithmetic says that 7000 joules at 12 volts gives a little under 600 amp-seconds assuming no loss of voltage i.e. about a sixth of an amp-hour. A typical lead-acid car battery would be nearer 50 - 100 amp-hours. Granted that you wouldn't normally need that whole 50+ Ah to start the engine, but if the starter is drawing a couple of hundred amps isn't that little battery going to go flat within a few seconds? What am I missing here?

[DuraAce]

GreenV8S said:

What am I missing here?

I couldn't attempt to question your maths. I can only go from direct experience of using it numerous times.
Its started cars from 1.0 to 3.0litres with no drama. Granted it does not spin the starter quite as quickly as a fully charged new car battery would but its more than enough to start them.
I keep one in the glovebox of each of my cars. They hold their charge for ages but I charge them up once a year just to be on the safe side.

[Pothole]

DuraAce said:

Perhaps so but they aren't much use if you haven't got a second vehicle available.

Except the OP has said he does.

[mighty kitten]

I have the 2000a version that I got for £135 , it’s started dead batteries on big vans and has done several starts between charges with no issues .

[SlimJim16v]

Tom_GGG said:

I found this one online, would this be suitable ? https://www.amazon.co.uk/gp/product/B01BEZV0IA/ref...

That's one of the higher current ones, so should be OK.

[DuraAce]

Pothole said:

DuraAce said:

Perhaps so but they aren't much use if you haven't got a second vehicle available.

Except the OP has said he does.

Happy days. Bit of a hassle taking 2 cars everywhere you go but it gets the job done I suppose.