Does a company just take 18650 batteries out of a laptop and wrap them up and sell them?
what are re-wrapped batteries?
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Are You Using a Rewrap (Rebranded) Battery?
- Learn what a rewrap cell is. If you are using rebranded cell, does that mean it is inferior, poor quality, or even dangerous? Which batteries are suspected to be rebranded batteries.
I'm honestly confused by this very oft repeated claim... if true, I'd love verification.
Producing an 18650 (or any LiIon cell) is no big deal. The equipment is pretty standardized industrial machinery. You can purchase a turnkey solution from the manufacturers.
And I suspect there are dozens of good sized installations in China alone.
Hell... across their various product lines, it looks like EnerSys alone has a few in the UK... and almost a dozen in the US.
The trick... the real trick... is maintaining the absolute clean room environment required to ensure lack of contamination in the layers (very important for safety), and consistency of performance.
Running a production line is not.
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That would be great, IF rewrap batteries weren't often purchased from the big manufacturers as rejects from their Qc bins, and/or re-wrapped to give a (false) higher rating on the battery, to get more money for it (even if it's underpowered for your setup.)
You can check out Mooch's blog | E-Cigarette Forum for more information, he has investigated and tested various rewrap batteries, which really does prove these claims. You can also find a battery chart with "safe" authentic batteries and listings on where to buy authentic batteries for safe vendors.
This is an area that's been pretty extensively studied on ECF, actually. I'm glad we have Mooch, because to *me* the most dangerous part of a mod is not the coil, not the e-juice, but the batteries. Using sub-par or defective batteries will stress your mod and potentially lead to even more serious problems. Re-wraps are not a good idea...
Anna
You can check out Mooch's blog | E-Cigarette Forum for more information, he has investigated and tested various rewrap batteries, which really does prove these claims. You can also find a battery chart with "safe" authentic batteries and listings on where to buy authentic batteries for safe vendors.
This is an area that's been pretty extensively studied on ECF, actually. I'm glad we have Mooch, because to *me* the most dangerous part of a mod is not the coil, not the e-juice, but the batteries. Using sub-par or defective batteries will stress your mod and potentially lead to even more serious problems. Re-wraps are not a good idea...
Anna
I believe it comes down to simply purchasing batteries made by a known manufacturer and sold by a reputable vendor. Everything else is a crap shoot as to sourcing, quality, and ratings. Given that you can genuine batteries at a pretty low price it's hard to justify any other approach.
Knowing what's under the wrap brings peace of mind for $5-6 per cell. Really good batteries are cheap.
pbursardo on youtube has a video of a visit to a battery factory in china that is partly owned by Aspire. Very interesting and worth watching. I suspect that not all batteries are created equal even in one production run in one factory. So the batteries are tested and graded and the best of the best go to preferred customers and others go to other channels the brand sells to (like us) or are sold at some discount to rebranders. They may be perfectly good batteries but may not quite as perfectly good as the creme de la creme. The major manufacturers probably do this. What I saw in the pbursardo video is that craftsmanship matters. May be the quality and integrity of management in a particular factory matters the most.
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If my current demands were low to modest, knowing I was buying a B stock 20A that maybe will get warm faster than A stock would be OK if the B stock was $1-2 compared to $5 for an A stock battery. However, now you can easily spend twice as much on a battery of poor quality just because someone makes up a cool looking wrap for it.
My hand and face are worth more than a few dollars to me. Not buying any unknown rewrapped batteries or buying from any shady dealers, not worth the chance.
Agree with Baditude.
Not all rewraps are bad news.
I know the connotations if a shifty guy sitting there with his hairdryer wrapping binned Sony batteries with a funky new label and claiming 40+ cdr but if I'm not mistaken, AWs are rewraps (good ones at that).
I think the firm rewraps second class quality batteries and puts them through rigorous testing to ensure their safety.
I use AW and feel very comfortable doing so.
Not all rewraps are bad news.
I know the connotations if a shifty guy sitting there with his hairdryer wrapping binned Sony batteries with a funky new label and claiming 40+ cdr but if I'm not mistaken, AWs are rewraps (good ones at that).
I think the firm rewraps second class quality batteries and puts them through rigorous testing to ensure their safety.
I use AW and feel very comfortable doing so.
The main problem is you have lots of Chinese rewrap companies making outrageous claims for batteries. UltraFire is probably one of the worst and they end up getting sold on Amazon and eBay to people.
One seller on eBay if you do a search is selling UltraFire 18650 and claiming they are 6000MAH. Others selling them as 5000mah.
There are so many different wraps, there must be 20 companies using the name. I guess the only good thing about them is that they are usually protected batteries and sold for flashlights. But that won't stop someone from trying them to vape with.
They aren't much cheaper than good name batteries from reputable dealers either
One seller on eBay if you do a search is selling UltraFire 18650 and claiming they are 6000MAH. Others selling them as 5000mah.
There are so many different wraps, there must be 20 companies using the name. I guess the only good thing about them is that they are usually protected batteries and sold for flashlights. But that won't stop someone from trying them to vape with.
They aren't much cheaper than good name batteries from reputable dealers either
Sorry, no one has answered my question yet. I think I understand what a re wrapped battery is.
I don't think a lot of people know that laptops have 18650 batteries in them. Maybe my question is silly. I was just asking if anyone thinks that manufacturers are taking apart used computers, and re wrapping the batteries.
I don't think a lot of people know that laptops have 18650 batteries in them. Maybe my question is silly. I was just asking if anyone thinks that manufacturers are taking apart used computers, and re wrapping the batteries.
Beamslider answered you in the first post after yours.
When manufacturers produce batteries, during the QC process some cells don't come up to scratch. These B or C grade cells are bought in bulk by companies like AWT and Efest who put a new colorfull plastic wrap on them, put often ridiculously over inflated specs on them and resell them for more than the the original companies cell the A grade cells.
Not only is this dishonest and greedy, it's potentially dangerous. If you buy a battery that says 40 amps on it, as a consumer you assume that it is capable of that. At the least the cell just won't perform, at worst it will injure you or others around you.
The practice of removing 18650s from laptops or power tools is not done on a commercial scale (as far as I know), but by misguided individuals and is highly ill-advised.
I think everyone that buys rewrapped batteries hopes that it wasn't picked out of an old laptop pack. But some things are just unknown and unknowable, which is why I buy LG or Samsung from a reputable source
(not suggesting those are the only good brands, just happens to be what I have bought and and I'm comfortable with)
My own philosophy is that if I'm going to carry them in my pocket and fire them at near their CDR next to my face I want to eliminate as many of those unknowns as possible. And at $5 a pop for the best of the best, it isn't really a matter of saving money but just buying as smart as possible.
It's really very simple, only buy genuine batteries from Sony, LG, Samsung or Panasonic.
Once you understand the business model and the 'ethics' of the battery rewrappers then the why becomes painfully clear. Have a read through the several hundred cells Mooch has tested if you don't believe me.
List of Battery Tests | E-Cigarette Forum
Once you understand the business model and the 'ethics' of the battery rewrappers then the why becomes painfully clear. Have a read through the several hundred cells Mooch has tested if you don't believe me.
List of Battery Tests | E-Cigarette Forum
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