1900amp jump start packs

Sorry Jo K,

no experience with these, but haven't heard too many bad things about them either.

What puzzles me is this 1900amp rating.

If you wanted to push a current of this kind through a starter motor, you'd have to raise the voltage to 70 or 80 Volts (and blow it up in the process).

So this rating is rather the short circuit current rating of the battery I'd say.

Sorry if this is a bit off topic to your question.

Best regards, Peter

A 75 a/hr thumper is about $850 . I can but 2 x 120 a/hr ritar agm batteries for around the same price .

Jo,

Be carefull.

The amp rating (is it 900 amp?) is the amount of current that can flow from the battery pack in a short period of time, which is all that is required to jump start your car.
Most of these type of packs however, are only rated at around 17 A/h (amp hour) capacity which is really only good enough to run a fluro light or two.

I can obtain two days when running my 40 litre Engel fridge from the 75 A/h Thumper, but the fridge draws a maximum of 2.5 amps and I have it set on position one, which is cold enough and doesn't unduly drain the battery too quickly.

You would be better off to invest in a Thumper battery pack of 75 A/h for both portability of running a fridge and the ability to jump start your car if necessary.


Bill.

The point is they are just a battery inside a nice enclosure
to compare costs look at 75A/h AGM ve 75A/h "Tumper"
You could save a lot of money building one yourself - if you want to
The enclosures are even availiable at Electrical suppliers

I have a Blue Apple "outback??" and its now 10 yrs old and still works well
hasnt worked that hard and kept charged after use.
Theres just 2 small batteries inside all wired to outlets.