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Busta wrote: It says the output power at 12v is 2 amps. A small car battery output is about 60 amps and a starter motor will draw close to that. So unless the idea is that you leave it for a couple of hours to charge the car battery up, I can't see how it will ever work?
ETA
Just seen, further down the page it says 250 amps at 12v! Which is very impressive, but far higher than those jump leads would ever take, let alone any wiring within.
Also it can apparently start your car 20 times but only power the LED light for 40hrs (I have a single AAA powered headtorch that lasts that long) and can only charge a phone 10 times? That seems odd.
I can see it helping if your car battery is tired and just needs a bit more oomph on a cold morning, but that is a good sign that your car needs a new battery, which will cost about the same as this! When a car battery is flat (e.g. left the lights on) then there is no way this will help. They even say it only works above 20% charged.
So, unless like in Biasmechanic's example you have lots of cars with tired batteries you don't want to replace, I'm a bit sceptical of it's worth.
Just to add a bit more. We usually use our one for cars with weak batteries but it has no problem with completely dead ones either. A couple of days ago it happily started the 2.5tdi bongo that had a flat battery before it was parked in the yard a couple of months ago and we have a silvia in at the moment with a totally dead battery (literally nothing work until the jump packs connected). When we get breakers in without batteries we just clip this onto the terminals and it starts them fine. (I really dont recommend you do this, I'm just saying that it has enough oomph to start a car with no battery.)
i have worked as a vehicle technician since 1978 i am up to senior master technician now and the last 2 years i have worked with a battery specialist as well idiots plaster the battery terminals with grease you don't do that any more you need to keep batteries clean and terminals clean ,, if they are dirty and greasey you get voltage drop across the top of the battery and if the terminals are all greasey if you are using jump leads or jump packs you will not get a good contact some of the cheep jump leads will not even start the car ,,, i olden days when the terminals on the cars were lead and the batteries were the old top up type back up to the 80s you put a very thin smere of grease on them and thats all , i get to see battery terminals daily which some brainless morron has plastered in grease and you can not see them and some Cowboys use copperslip on them ,, So just keep the tops of the batteries and the terminals clean and it makes them last longer and if you need to jump start you get good contact between the terminal and the jump leads or jump pack
Tried to buy this @ aliexpress and says it is not available ! on checkout . I have set up an account etc . So tried other suppliers on aliexpress with the same result . What am I doing wrong guys ? Thanks .
