KMASHI Force K2 Car Jump Starter 8000mAh Mobile Power Bank £25.54 @ GearBest
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KMASHI Force K2 Car Jump Starter 8000mAh Mobile Power Bank £25.54 @ GearBest

54
Found 8th Jan 2016
Something different!
Some great reviews on these and similar units (higher priced and similar specs) You can charge your device from i as you'd expect, with a max output of 5V 2A

It has a torch built-in with SOS flashing functions (Can use that to show the wife which pub i am outside of ;))

AND... You can jumpstart your motor from it. Takes 4-5 hours to charge and you are set to go.

Charging time: About 4 - 5 hours
Input: 5V 1.85A
Output: 5V 2A (max)

Package Contents : 1 x Car Jump Starter Power Bank, 1 x Storage Battery Clamp, 1 x USB Charge Cable, 1 x English User Manual

● High capacity battery of 8000mAh is adopted for fast charging
● Support auto 12V emergency jump start and entirely replace the included battery for a car startup
● It also supports general mobile phone / laptops charging and completely can be used as mobile power bank
● High luminance and multi-modes LED light (Include keep the light, flash, SOS signal)
● It is the ideal choice for night shift workers, overtime workers and many others
● Four levels of power display indicate battery status, real-time recharging reminders, automatic shutdown under no-load condition
● Multi-protection, safer to use
● Over-current protects the device from overload, making it more convenient and more energy-efficient
● Persistent current: 80A
● Peak current: 200A
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54 Comments

AND... You can jumpstart your motor from it.



Good luck with that...........
Lol at descrition
Fast charge 4-5 hours
Ideal for overtime workers wtf
This may start a car but will no doubt need charging straight away
I wouldn't depend my life on it
Bet it will struggle on a diesel
I bought a 50800 may off eBay for £30
I wouldn't let this anywhere near my motors. I also wouldn't jump start any car made in the last 5 years or so

Looks like a Chinese bodge it job



Edited by: "royals" 8th Jan 2016
Start a car? I very much doubt it. At best it may provide just enough extra oomph to start a small engine with a weak battery.
Mate has a similar one, sorry don't know the make but its an absolute brilliant piece of kit. My 2.5 diesel voyager jumped off it no problem whatsoever.
Why all the haters?
He buys and sells cars and uses his all the time.
jtd

Mate has a similar one, sorry don't know the make but its an absolute … Mate has a similar one, sorry don't know the make but its an absolute brilliant piece of kit. My 2.5 diesel voyager jumped off it no problem whatsoever.Why all the haters?He buys and sells cars and uses his all the time.



Lack of knowledge regarding electrics, I would imagine - low voltage high amps. I wonder how many cycles you would get from one - not that you would expect to use it very often, but not too big so ideal for motorbike.
worthinger

Lack of knowledge regarding electrics, I would imagine - low voltage high … Lack of knowledge regarding electrics, I would imagine - low voltage high amps. I wonder how many cycles you would get from one - not that you would expect to use it very often, but not too big so ideal for motorbike.



Probably more cycles than from an ALDI lead acid equipped jump start unit left in the garage for 2 years without use - stupidly I didn't keep charging the unit, so it died on me, if this works and there's no electronic reason why it won't, it's a brilliant idea.

mike
I was doubtful at first, Bought a WUHAI 50080. Started one of my Mercedes petrol cars no problem, even without leads being attached to the battery. Also started a Motorhome with a 3 litre diesel engine that was flat. They do work. Remember to charge every 3 months. Had a Streetwize 5 in 1 in the past that was useless.
Amazing if true, starting a typical Diesel can use 600 Amps at 12V, which would mean this 8Ah battery discharging in about 1 second.

For that reason I call BS, but it could be it assists the car battery supplying say 20 extra Amps at 12V.
Roger_Irrelevant

Amazing if true, starting a typical Diesel can use 600 Amps at 12V, which … Amazing if true, starting a typical Diesel can use 600 Amps at 12V, which would mean this 8Ah battery discharging in about 1 second.For that reason I call BS, but it could be it assists the car battery supplying say 20 extra Amps at 12V.



cnet.com/uk/…rs/

Perfectly viable and work very well - this could potentially start the vehicle you describe half a dozen times.

You are confusing/comparing ah with cca and these are not equivalent.

Edited by: "worthinger" 8th Jan 2016
ive got one twice the power of this and it cant jumpstart my 1.6 petrol
Love the haters lol, all electronic engineers with nothing better to do than slating something they have not tried.
Before you all start I know basic calculation says these things don't work in the one I used did and does on a regular basis, It was used to start an old transit the other day and cranked over that long the croc clips on the leads actually started to melt. I will find out what type and make just for you haters once I manage to get over all the hate lol.
i bought a similar one from from aliexspress, total crap, i had the bin it, very poor quality
I got a 16800mah pack and have used it a lot , I had a bad battery and from one charge started my diesel engined car three times before it was not able to give enough juice to start. I would say this one would start a car maybe twice if you are lucky but even then i would only rely on it starting a car once, and if the car needs to turn over a few times to start this might not be powerful enough.

The main benefit of these devices is that they are so small and fit in the car easily, can also be charged while driving but 5 hours of diving needed. I would say this is worth it but the bigger capacity for £35 on amazon is much better value.
I paid about £90 for one of Amazon 5 stars with a lot of reviews
I am a farmer and it has started a navara from completely dead and a 5litre tractor
johankirchner

i bought a similar one from from aliexspress, total crap, i had the bin … i bought a similar one from from aliexspress, total crap, i had the bin it, very poor quality



You spout similar BS on Gearbest threads yet you continue to claim to buy from these companies..... why?

Why not learn from your "experience" and pop down to B&Q or Maplins for your electronics?????
Edited by: "forcedv" 9th Jan 2016
I work in the motor trade these do actually work really well we have one of these also have a sealey electro start 600 which has no battery in it what so ever and can still jump start a car.
Another +1 for these units, they work surprisingly well for a small unit, that said however be sure to make sure the model can support the peak CCA required by your engine, this unit will do 200A which is suitable for a small engined car or bike, a 2.0L plus diesel will require 2-3x more which is a job for the 50800 unit at 600A, don't expect these to work continuous they will need topping up but will get you started in an emergency.

as a rough calculation most car batteries will provide 8-9x CCA of its capacity, so if you have a 43ah battery the capable cranking amps will be in the 360A region, the posted deal here will struggle and will probably need to be left charging you battery to assist the crank rather than working instantly. likewise a 60A battery will be good for around 540A that of a large diesel.
I had one, but it needed charging up - so I charged it in the car, but it flattened the car battery, so I used it to start the car. Brilliant.
Roger_Irrelevant

Amazing if true, starting a typical Diesel can use 600 Amps at 12V, which … Amazing if true, starting a typical Diesel can use 600 Amps at 12V, which would mean this 8Ah battery discharging in about 1 second.For that reason I call BS, but it could be it assists the car battery supplying say 20 extra Amps at 12V.



Always get a school kid to check your maths before posting

8/600 * 3600 = 48 seconds.

These small Lithium Ion jump packs can deliver a surprising amount of current, and there are plenty of demos on YouTube of them starting big engines. However whether this particular device is any good , or whether it's liable to burst into flames I wouldn't like to say.


This one would probably be ok for small engines of 1.0 litre or so, It wouldn't start a mid sized car needing 400 to 600 CCA to start, I have the Anypro 600CCA and its just unbelievable what it can start..
In the last week I have been called out to start friends and relatives cars from a Clio 1.6 petrol to a BMW 4x4 4.2litre and its done the lot without a hitch including a Mercedes S class 3.4 litre without the battery attached at all.

Its still going on its original charge and I still have 3 bars lit from the 4 when its fully charged up and thats probably about 8 jumpstarts so far, the manufacturer quotes 20 jumpstarts on one charge and so far I don't disbelieve them..

Mine has a LI-Po battery in it but many will have the lower end Ni-mh

crazylegs

Mine has a LI-Po battery in it but many will have the lower end Ni-mh



I'm fairly sure that only LiPo batteries will work in these handheld jump devices. Nimh wouldn't be able to supply anywhere near the current required (or this level of storage capacity) unless they were as big as a house brick.

LiPo batteries can throw out an enormous amount of current. Their energy density is pretty amazing too, especially if, like this application, you aren't expecting them to do many cycles in a lifetime. The discharge circuit will let you squeeze every last mAh out of them before it shuts off. These work really well, but if you are using them every day (and recharging between), expect them to be going a bit limp after a few weeks.
Say goodbye to your ECU
This might sound a little crazy but why not put the money towards fixing the underlying fault on the vehicle?
Obstinate_Person

Say goodbye to your ECU



Probably safer than jumping off of another car. Actually, why is it any worse than starting off your car battery?
marty-401

This might sound a little crazy but why not put the money towards fixing … This might sound a little crazy but why not put the money towards fixing the underlying fault on the vehicle?



A flat battery isn't faulty neither is a battery that's failed in the supermarket car park. At least with this you can get it going to drive down to Halfords and get a new battery fitted.
Happened to my wife a few weeks ago.
Sorry for not making it clear but I was refering to the folk who seem to rely on these on a regular basis.
royals

I wouldn't let this anywhere near my motors. I also wouldn't jump start … I wouldn't let this anywhere near my motors. I also wouldn't jump start any car made in the last 5 years or soLooks like a Chinese bodge it job


You dont have a clue what you are talikng about. I have one and it does work well and on a car thats less than 5 years old. THANKS OP.
crazylegs

This one would probably be ok for small engines of 1.0 litre or so, It … This one would probably be ok for small engines of 1.0 litre or so, It wouldn't start a mid sized car needing 400 to 600 CCA to start, I have the Anypro 600CCA and its just unbelievable what it can start..In the last week I have been called out to start friends and relatives cars from a Clio 1.6 petrol to a BMW 4x4 4.2litre and its done the lot without a hitch including a Mercedes S class 3.4 litre without the battery attached at all.Its still going on its original charge and I still have 3 bars lit from the 4 when its fully charged up and thats probably about 8 jumpstarts so far, the manufacturer quotes 20 jumpstarts on one charge and so far I don't disbelieve them..Mine has a LI-Po battery in it but many will have the lower end Ni-mh


Thanks for giving such good advice and information, you are correct, this one would only be good for small engines. I was amazed how good mine was as well. It wouldn't be much good for a car that just won't start and you need to crank and crank though, it's mainly good for flat battery jobs, like when an idiot (me) left the lights on or you have an older car where the radio flattens the battery if you don't start it for a few weeks. Great as an emergency charger for phones, mp3 players games consoles etc.
Worth spending abit more for a decent one we use this one at work a lot its £60 but build is excellent amazon.co.uk/gp/…s=1
jtd

It was used to start an old transit the other day and cranked over that … It was used to start an old transit the other day and cranked over that long the croc clips on the leads actually started to melt.


And this is a recommendation?
GuigsyUK

The discharge circuit will let you squeeze every last mAh out of them … The discharge circuit will let you squeeze every last mAh out of them before it shuts off.


Ah! I'm assuming there is no shut off circuit at all because it would require an enormous FET. So you trade current/energy for longevity. Fair enough.
Can you still use these to jump start, i tried a battery booster on a ford and it lit up like a christmas tree. AA said should not use these on modern cars.
GearBest are effin aweful. Had a nightmare dealing with them before christmas. They point blank refused to refund or exchange items damaged during delivery - despite me paying postage and postage insurance!
AVOID
I expect these are fine if you left your lights on and the battery isn't fully flat but I don't expect it to be able to start the old Landy that gets left at the other end of the field and only used twice a year...
jimbob86

I expect these are fine if you left your lights on and the battery isn't … I expect these are fine if you left your lights on and the battery isn't fully flat but I don't expect it to be able to start the old Landy that gets left at the other end of the field and only used twice a year...



As I mentioned before, I don't know about this specific pack (and GearBest appear to be a pretty terrible seller), but these small lithium ion jump packs can push out far more current than you'd expect. Have a look at Photonic Induction's channel on YouTube, he starts his 5L V8 Mercedes with only one of these style jump packs connected to it (no car battery at all) and also started a 1.6 diesel with a completely dead battery with ease.
willy528

I got a 16800mah pack and have used it a lot , I had a bad battery and … I got a 16800mah pack and have used it a lot , I had a bad battery and from one charge started my diesel engined car three times before it was not able to give enough juice to start. I would say this one would start a car maybe twice if you are lucky but even then i would only rely on it starting a car once, and if the car needs to turn over a few times to start this might not be powerful enough.The main benefit of these devices is that they are so small and fit in the car easily, can also be charged while driving but 5 hours of diving needed. I would say this is worth it but the bigger capacity for £35 on amazon is much better value.



​Link to the £35 one please? ta
itsjonboyok

I paid about £90 for one of Amazon 5 stars with a lot of reviewsI am a … I paid about £90 for one of Amazon 5 stars with a lot of reviewsI am a farmer and it has started a navara from completely dead and a 5litre tractor


You're not a proper farmer if you haven't got a Landie!
anygood for a heart attack
I have used my quadcopter lipo (4s 45-90c) to start my car (2.5 V6) and no problems what so ever. These will start a car anytime.
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