shinester
Senior Member
China's white trash
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Email: shiny@ausprep.org
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Post by shinester on Jun 20, 2015 9:23:34 GMT 10
 Upon seeing this, I started writing this up thinking, wow, what a great source of portable power... It jumpstarts, provides power for phone, laptops and many other items via all of their adapters provided can be charged via 240AC [would need a $3 adapter for Oz] or 12VDc via cigarette port, even includes a LED light. Every day you could throw it in the back of the car for jump starts or phone charging [charge it up every few months!] or perhaps for charging up via solar panel [with a regulator] in an austere environment. Etc. But wait, 51Ah? I was about to install a bank of them in my house upon seeing the price and size. How could something so small give such an amazing power rating for so little dollars. Oh it can't is how. The figure is completely fraudulent. Sure they will jump start your car as will Lipo batteries [similar battery is worth about $52 separately] they will charge your phone etc but their rating is probably 1/10 of the rated output or less. ============================================================= Capacity Test - different model but shows the 'actual' capacity of 4.7Ah. If you want about 5Ah of batteries as backup power, with a capacity to jumpstart your car then I suppose it has a place. It pays to do a bigger investigation on these sorts of things, I looked far deeper than any typical consumer does because I was wanting to see an independent load test done on them and sure enough, it failed and upon opening we find it's got 4700mAh cells, far less than the rated output. If you look at the size of LiPos for the package the best capacity would be about 5mAh, about the rating of the cells in the video. As the old saying goes "If it's too good to be true, then it probably is." |
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arkane
Senior Member
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Post by arkane on Jun 20, 2015 11:08:37 GMT 10
That alone will not jump start a regular car!
You need 9v at several hundred amps for a few seconds to start even small cars!
That battery alone cant supply that energy! the size of the leads show its lack!
It might boost a battery with a low charge to give it the extra to crank but again not much!
Best thing is to make whatever modifications are needed to install a fark-off huge battery and put a high wattage low resistance resister in the charge line to limit maximum alternator current!
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shinester
Senior Member
China's white trash
Posts: 3,119
Likes: 3,578
Email: shiny@ausprep.org
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Post by shinester on Jun 20, 2015 17:05:48 GMT 10
Nah that's incorrect, you're probably not familiar with LiPo batteries, 4.7Ah batteries can produce 630A but typically only needs 250A at about 7V or so to start a car. Below is lower rated [but they're all suspect] version which starts a car 23 times in succession, the guy's running a voltage and amp meter on it.
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arkane
Senior Member
Posts: 172
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Post by arkane on Jun 20, 2015 17:46:38 GMT 10
Shinester I started life as an Electrician and I call "Bullshit"
You can get an idea of any batteries output performance simply by its charging ability!
250AMPS through that battery and it is a "BOMB" literally!
It may start a small warm fuel injected engine once or twice!
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shinester
Senior Member
China's white trash
Posts: 3,119
Likes: 3,578
Email: shiny@ausprep.org
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Post by shinester on Jun 21, 2015 2:17:11 GMT 10
When provided with evidence, 'saying bullshit' doesn't actually mean anything, you'll have to provide some reason for my information to be invalid. I'm more than happy to be incorrect, though the the evidence is clear, started 23 times in the video, and I mentioned that LiPo's are different battery technology, they're relatively new, to which to get more specific they can do up to 70C with a 140C peak, which you can check out on Wikipedia HERE. So, no they're not going to catch on fire discharging at 70C or whatever they're rated for which might only be 50C which is still 50x4.7Ah if they're the same as the first example. If you've got a counter to that I'm more than happy to learn from your electrician expertise. |
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Post by Peter on Jun 21, 2015 9:19:22 GMT 10
Keep it civil folks. We're here to share thoughts - not have a go at each other.
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shinester
Senior Member
China's white trash
Posts: 3,119
Likes: 3,578
Email: shiny@ausprep.org
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Post by shinester on Jun 21, 2015 16:07:44 GMT 10
No need for ad hominem, insults are pointless, particularly since you've still not countered the claims at all.
So, 4.5Ah x 70C = 315A potentially with a peak of double that, though the packs are probably of lesser design [aka who knows]. Besides the evidence is in seeing the car start 23 times, want more videos or are you right despite evidence? The pack was shown to do 420A max and if you watch the videos you'll see how he did that with a multimeter. The guy doing it is an electrical engineer, Im certainly no expert, just a hobbyist with an interest, happy to be wrong, but you kind of need to show how I am if you make such claims.
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antiag21
Full Member
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Location: Perth WA
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Post by antiag21 on Jun 21, 2015 18:37:49 GMT 10
Oh boy......
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Post by SA Hunter on Jun 21, 2015 21:01:05 GMT 10
Personal attacks are NOT on!! These posts of name calling have been deleted!!!!!
We are all not experts here, so attacking a perceived ignorance is not helpful.
Failure to abide by Forum rules will end with a permanent Ban!!!
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