Seems a good price for a 20000mAh battery pack with good reviews. Click apply coupon, and it will take 20% off at checkout to make it $36.79. Might be for prime members only
CamelCamelCamel.
Seen these comments on other HEYMIX posts. I assume it’s relating to their wall chargers?
Some of their products don't meet the Australian standards.
Someone who was an electrician a while back opened up some of their devices and was shocked to how poorly constructed they were.
I have had a few of their products and they are quite hot on use not to mention some have failed over time.
I am not sure if the products have improved but I would be cautious.
There has been many Chinese brands that pop out of no where then disappear after a few years.
You also see random new brands pop up here and there now and then.
I bought a couple of 45w wall chargers when they came out. One died within months. The other seems ok, but that's not a good ratio.
I was steadfastly refusing to consider anything HeyMix U til the Prime Day their 12 outlet tower. The reviews seemed good and I have convinced myself that the wall chargers are probably more complex and easier to muck up than a simple powerboard.
Tonight I read some more of the OzB posts including by that sparky. While I now feel pretty dumb, a lot of users still seem happy. So I'm going to stick with my massive gamble, and will report back here when it if the tower fails.
@y2k: I've got 2 of the GaN 65w ones in 2021 and it works well, guess I've been lucky so far. On the other hand, I got a Cygnett PowerPlus 45w from Telstra and that burnt up and started smoking after 4 months of use.
Someone who was an electrician a while back opened up some of their devices
Who?
Electrican or electronic engineer? They might have different understanding in electronics.
@G-Bard: Some of the basics are easy for anyone to check -
Just have a look at one star ratings for the infamous Heymix power board.
And it's a 4.5 rating. Great work reviewers /slow clap.
@ihfree: Interesting, but, none of them about the charger or the powerbank though.
Electrician should now about L and N, so that's fair enough :)
@G-Bard: As the reviews show, you don't even need to be an electrician to detect many issues.
For example, there are issues reported with various models of charger, for example 120v on USB grounding.
Many issues seem to disproportionality effect Heymix - you don't see that on Anker, Belkin or Cygnett deals. Something is up, IMO.
@ihfree: The 120V example, the link shows that it only comes with 2 pins plug … I might be wrong, but, there's no ground/earth there? 😅
You need 3 pins to have ground/earth.
So, not sure what he refers to ground. Given that the unit only comes with 2 pins plug, it may not have ground per say.
Appreciate you giving references.
@G-Bard: If it's 2 pin, it must be double insulated, so it doesn't kill you.
If you can feel a tingling, something is not right and insulation has failed.
The ground he refers to is the ground on the lightening cable he got connected.
@annarchon: I'm not sure whether we are referring to the same tingling or not
Try touching your XPS or MacBook with their supplied power supply on tiles flooring. I surely felt tingling every now and then.
It's just people jumping up and down when it is connected to 'Chinese' chargers
https://www.google.com/search?q=macbook+air+tingling+sensati…
I'm not sure whether we are referring to the same tingling or not
Try touching your XPS or MacBook with their supplied power supply on tiles flooring. I surely felt tingling every now and then.
Yeah, did you measure 120V across it and be numb for 30 minutes as well?
They shorted earth on the usb port/cable to something running 120v. There is no defending this. Yet some like yourself keep on trying.
@G-Bard: I am not sure what the behaviour should be here and, as you mentioned, tingles are to a large part expected with ungrounded chargers. As to what voltage/current is present in these scenarios, I am not too sure what would be normal, though, based on that comment and one of the reviews I would suspect it is outside of the norm.
The first device I plugged in (a Polar watch charger into USB-A) gave me an electrical current & shock the minute I picked up the watch to move it, which had my hand tingling for the next 30 minutes. Not really thinking, I tried again in another port and got another tingle down my arm.
https://www.amazon.com.au/gp/customer-reviews/R3KW2K2MC2A8ZA
I would never buy one of these products so I am not personally going to read into it too much more.
@ihfree: I might be lucky, but, I started to get a charger after reading the discussions. To date, I have 4 without any issues apart from it is readjusting its power distribution when multiple devices are connected. That settles without few seconds though.
Not sure what kind of shock/tingling, but, it is quite common when the device has metal casing.
https://www.google.com/search?q=macbook+air+tingling+sensati…
@G-Bard: Just based off my reading and a look at reviews a few months ago, there is a lot of variation between model, batch, etc. You could probably buy some of the more established models with a large number of reviews and have a reasonable chance of having a reliable device. Potential buyers should also be checking the 1 star reviews. Many of the Heymix models here do not fit that criteria in that they are newish products with a low number of reviews.
You just need to keep in mind that the power board is well reviewed and appears to have major issues. Amazon reviewers aren't great at reviewing more technical details or picking up more subtle but dangerous flaws.
You may be lucky and you may continue to be lucky especially if you have followed the criteria above. You could probably find tear downs/analysis of some of their products under different brands, though, there wouldn't be any guarantee of quality or shared components.
IMO, even one product with such a major flaw is reason to avoid the brand entirely. They do appear to be overrepresented if you do a search on Ozbargain of various brands and terms for failure, coil whine, etc.
I's unclear what the certification process is or what checks are in place. According to other users, this process may be skipped entirely or certificates reused for different products.
Some general background reading
https://www.ozbargain.com.au/comment/12996125/redir (+97)
https://www.ozbargain.com.au/comment/13977117/redir
https://www.ozbargain.com.au/comment/13986743/redir
Yep, mine blew up and tripped the circuit breaker.
These comments are tired and old now - always posted by attention seekers looking for a quick upvote, and are not at all for the benefit of any potential buyers.
I'm not defending HEYMIX products, but "fire hurr hurr" is hardly intelligent input. At least be specific about what some of the potential problems are and what others have reported is actually wrong with it. But wait, that actually requires research, so "fire hurr hurr" it is.
Nope, I disagree.
I believe we should be making aware of a poor quality product to our fellow members.
It's people like you that turn a blind eye and keep quiet that makes things worse.
I believe we should be making aware of a poor quality product to our fellow members.
Yes, so actually provide some useful information about why the product is poor quality, not "fire fire hurr hurr".
@p1 ama: They omit and skip a lot of safety features, their circuit topology is just disgustingly poor and ancient, they cut corners in component choice in their pcb, they have basic fundamental errors in their pcb design that any novice ee could point out is bad design if you open them up and know what to look for.
How about you look up what you’re after instead? What is useful to you? Do you want me to tell you about the $900 tablet the chargers have blown, the exploded units with black burn marks, the abysmal failure rate?
All of these have been discussed, time and time again, and frankly its on you to look it up. Nobody is going to do a detailed write up of the same thing, every post just for you.
@p1 ama: I never said Fire fire hurr hurr.
But next time i'll be sure to spoon feed you since you aren't wise enough to use the search function or google
Not sure why you're getting so worked up about it.
Appears that you are some kind of incentive to support Heymix.
I never said Fire fire hurr hurr.
It's essentially what you said.
But next time i'll be sure to spoon feed you since you aren't wise enough to use the search function or google
Well if you want to inform others, then do it properly.
Appears that you are some kind of incentive to support Heymix.
So asking for more information is now supporting Heymix? Seems like I hit a nerve calling you out for attention seeking eh? Don't worry, you can get your badge next time ;)
so actually provide some useful information about why the product is poor quality
What were your views on these links posted just prior/above your comment?
https://www.ozbargain.com.au/comment/12996125/redir
https://www.ozbargain.com.au/comment/13977117/redir
https://www.ozbargain.com.au/comment/13986743/redir
@Joda: I think they're great - we should make a collection of these actually informative comments and then pin them under any future Heymix deals. All for useful, informative warnings.
@p1 ama: I entirely agree with you!
One more below to add to the mix: https://www.ozbargain.com.au/comment/14039966/redir
So @p1 ama is "keeping quiet" by making a comment you don't agree with, that doesn't make any sense!!
I have 4x 65W Heymix GaN charges for about a year now, no fire so far, never ever once they trip my breaker.
It’s so ironic you say that, when your answers are a quick search away.
Just look it up yourself instead. Do some research into posts with peoples experiences.
Until these stop being posted or get banned, everyone should know about them. If the way you’re introduced to their issues is by people making one word comments, that’s fine too.
You have the power to actually research and use that search button.
You misunderstand my point - I'm all for informative posts that actually warn users about dangerous products.
However, the original post was:
Fire starter on the go!
If the reader of this comment didn't already know about the potential fire hazard, then this comment would not make any sense to them.
Let's not muck around. This comment is not aimed at the random person browsing this deal to warn them about potential dangers and risks, it is aimed at people who already know about the issue to have a quick chuckle. It's a meme to get attention and up votes, not genuine information for the potential buyer.
Chinese generics are all guilty until proven innocent.
And these "fire reviews" mainly seem to appear on OzB, This Heymix powerbank above has 32 reviews @ 4.6 stars on Amazon. Which is quite good.
I've never seen anyone say on OzB that their Heymix product caught fire and that they left a review on Amazon.
So they complain here but forget to leave a review where it counts, on Amazon.
You'll notice that virtually everyone that links bad reviews are only linking reviews written by people on OzB that have no proof that they actually bought it.
The reviews on Amazon are from "verified purchases" so they had to have bought the product!!
Yet when you type Heymix into the Amazon search engine virtually all the Heymix products are at or above 4.5 stars.
Heymix shill and the user who tried to coin "HH" or Heymix haters.
Why get wiring right when you end users will just give you a 5 star rating anyway?
https://www.ozbargain.com.au/comment/12996125/redir
This is also backed by multiple reviews over the past 6 months. There are reviews with a pictures demonstrating the issue. That product continues to be sold with the same issues if the reviews are anything to go by.
All this shows is that users see these items as a black box and are happy if they plug it in and it works or appears to work.
There are multiple products from the "brand" that appear to have issues consistently. I use brand loosely as it's basically just also the name on whatever OEM product. IMO, the brand is worth passing on regardless of review score.
@PukeyLuke: That's funny because a little bit of alliteration is perfect for a 4YOs. Here's your comment where you tried to coin the term HH.
Oh, you never completed the Heymix Challenge. Where's a reputable brand with similar feedback?
Shill harder.
@ihfree: I like the fact that you re-read, remember and hold a beef about comments I made almost a year ago, it makes me feel important.
I'm still living rent free in your head!
"Shill harder", Man you're killing me!!
@PukeyLuke: You may not have noticed this, but there is a search box. Computers are difficult aren't they? I'll put together a comment I can copy-paste in response to your review scores and leave it at that for the future. There's not much point arguing with a clear shill.
You're still encouraging the purchase of a brand which is potentially dangerous and sells known bad products based on review score. How's that power-board? 4.5 stars with wrong wiring, likely no surge protection?! Really makes you think? or, in your case well… Maybe we should do Australian Standards based on review scores.
I'm just calling out the "iT's GoT 4.6 sTaRs" angle. Regardless of the poster, my response would look roughly the same - have a think about that.
As for who is living rent free in who's head, that's that interesting question given how quickly you get emotional and turn to upset 4YO.
"Shill harder"
If it looks like a duck…
Amazon reviews are not worth the pixels that they are shown on.
https://reviewmeta.com/amazon-au/B0BZVND2JJ
https://www.wired.com/story/how-to-spot-fake-reviews-amazon/
Yes, the platform where review manipulation has never happened.
Companies have never offered discounts or monetary incentives inside packages to get users to leave 5 star reviews.
Companies have never given products out in exchange for 5 star reviews.
There aren’t any companies you can approach to actually BUY reviewed either.
They’re also certainly aren’t millions of dallars being poured into review manipulation to increase sales.
Sources: https://www.wired.com/story/fake-amazon-reviews-underground-…
https://www.safetydetectives.com/blog/amazon-reviews-leak-re…
https://www.mckinsey.com/industries/consumer-packaged-goods/…
Do you want empirical studies? Do you want me to get into how amazon is slow at combating these issues, and will always lag behind?
The truth of the matter is, you can’t trust amazon reviews alone. You should be looking at multiple sources, and there are multiple different forums, outlets, and sources that corroborate heymix issues.
But by all means… just look at amazon.
Verified purchases don’t mean anything, they certainly don’t mean what you think they do in the grand scheme of things if one wanted to manipulate reviews. I suggest you look into any of the sources mentioned that will better explain how these work, what to look out for, and why trusting amazon reviews alone is not a good idea.
Don't see the $20 off coupon
20% off coupon, prime members only
Need to be a Prime member
Mine shows 20% off coupon, not $20. Gets to $36.79
Yep, same here. Original price is $45.99. Makes no difference to the deal I guess…
Correct, 20% off coupon
Inb4 something something pixel exploded in somebodies hands
Title needs to be changed to 20% off
Probably better than the hand warmer posted the other day
Just in time for my Firefly flight.
Portable firepower although it does look like an inflatable mattress in the thumbnail
Good to bring to camping. Would be lit for fires
I usually use either romoss or anker
Everybody in reviews are just reading the specifications off for you saying it’s 20,000mAh, while I actually tested and only got 12,000mAh.
These reviews look really suspiciously similar as well in writing. I have a feeling these arent genuine reviews. One person even claims he got ONE charge out of this for his iPad, but doesn’t seem to realise you should be getting more than that.
Come on guys just think about it. How do you think they could possibly offer such battery capacity at that price? They’re using cells labeled incorrectly that add up to 20Ah, but the cells are garbage recycled ones from old notebooks that can’t even hold 1/4th their rated capacity.
You are being scammed somewhere to get this price. Returned the unit to amazon, as usual very disappointing by heymix again. One day people will realise you get what you pay for. Lithium Cells COST MONEY, you can’t just find bargain cheap cells for this stuff. Even the cheapest available cells would add up to being more than this battery bank costs….
Don't know why you're getting downvoted when you make sense
This is just a misunderstanding of how power banks work. It's common for 30-40% of the capacity to be lost in circuit heat and voltage conversions..
Firstly, you’re just flat out wrong. How can you go around trying to correct people with incorrect information even in the most extreme cases. The power loss isn’t anywhere near 40%, you’re pulling numbers out of your ass. Even the worst performing lowest tier garbage power banks don’t have efficiency that poor.
You have to go out if your way to make something have such poor efficiency, and you would additionally need cooling to dissipate that much heat if you understood just how much heat that is.
Secondly, If you had bothered to ask, you’d know that I accounted for this. Im well aware how power banks work if I’m going out of my way to measure them. I took measurements at both the cell level and output from the Buck Boost converter to validate fwiw.
If you look at any power banks from reputable sources that actually cost something, youll find that they are actually within 10% of their rated capacity, and on average have an efficiency of 85%-94%.
If your power bank is losing 40% of its capacity in heat, you need to go call the fire department.
[Multi-Protection] The HEYMIX 20000mAh Power Bank is designed with multiple protections to ensure safe and reliable charging.
HEYMIX, you're funny, such a jokester.
Many tests have been carried out in the HEYMIX 20000mAh Power Bank laboratory, proving the Power Bank is reliable and safe to use.
Wtf is a Power Bank laboratory? Hahahaha.
Is that their rough translation for 'We mass produce these and they didn't blow up on the assembly line so they're good to go!
This just further reaffirms that their products are dangerous when they have to make up shit like that.
I bought this last time it came up here. Pretty happy with it. Nice size and form factor and charges my pixel 7 pro fast using USB c
60% price increase in 1 month + 1 week. Regardless of technical merit of Heymix, how can this price be justified as good?
![[Prime] HEYMIX 20000mAh Battery Power Bank $36.79 Delivered @ HEYMIX Amazon AU](https://files.ozbargain.com.au/n/65/788465.jpg?h=7d2d143a)
Fire starter on the go!