FWIW this has caused a big storm in China. The root of the issue is known to be caused by the battery cell vendor Amprius changing the battery design w/o notifying the power bank manufacturers. AFAIKT Amprius lost the 3C certification (a certification in China) because of this incident.
Excerpt from the report above (translated using Google):
> The Paper learned from an insider that Anker Innovations' battery cell supplier is already a leading battery cell supplier in the industry, and did not inform customers after it changed materials. In addition to Anker Innovations, the supplier also cooperates with leading power bank brands, so the impact is huge. Although Anker Innovations did not name the supplier, an insider pointed out that the supplier was Amprius.
UPDATE:
There's an exclusive interview by 36kr with one of Anker's VPs:
First off, I love Luma Field. Always incredible to see what's going on inside things. Even just fun to scroll through their Twitter.
Second, Anker is one of the few companies I actually have a very high trust for. A few years back I bought a wall charger[0] from them, it has 2 USB-C and a Type A. A month in, one of the Type-C ports wouldn't charge if the other port was being used. If you send a support ticket they annoyingly give you a response with very basic trouble shooting. But if you respond to that you get a person. They just sent me a new one right away (<10 days) and there was no need to return the charger or anything. So I still use it, just blocked the bad port. I gotta say, whenever I encounter good customer service I become loyal.
I wanted to say this because I think a quality matters. Quality often takes nuances and this can often run counter to maximizing profits (Lemon Markets and all that). Looking at Luma's report, I don't get the indication that they had this issue because they were cutting corners but looks like it must be upstream[1]. But am happy to see they were giving gift cards along with the recall. Companies should minimize mistakes as best as they can, but it is important to judge them by how they handle mistakes. It can be easy to get caught in the negativity but I personally don't think I'll stop buying Anker products.
I've had my share of spicy pillows ranging from iPad to power bank from upstart company which became spicy after using it for just 3 times[1].
I've been overly cautious of batteries for several years now, I charge my devices with 1A charger and keep it between 40% to 80% . I now carry a single 18650 cell power bank instead of those 10,000 mAh, 20,000mAh power banks.
I don't sleep with phone, tablet or kindle on bed and I force my partner to do the same to her irritation. Last week her MacBook became spicy overnight and I had to rush to Apple Store morning, the price for battery replacement was more than the price of that MacBook in used market so I had to buy a new MacBook.
I miss the good old days where I could take the battery of the Nokia phone and spin it on the table to see if it's become spicy. I pray to EU gods to please force the manufactures to bring back user replaceable batteries.
Amazon sent me a recall notice about this one, indicating they had it from my purchase history, but oddly I couldn't find it in my own collection of power banks, or in the ones I gave to my wife. I'm worried I might have purchased one for another family member as a gift and not remembered who.
The recall is concerning, especially since once they started with the one, they quickly added several more to the list. I've ordered at least 17 Anker products over the last ten years (not all of them power banks). I pay the premium over cheaper external batteries, and I have advised my family in the past to do the same. This is ostensibly because they are supposed to be the guys that don't explode. If I can't even take that for granted, then there's really no reason to maintain customer loyalty. There are countless other, cheaper brands available online from no-name Chinese companies.
This scrutiny actually makes me more inclined to buy Anker products. There's more trust in a company that will transparently communicate, correct mistakes and raise the safety bar for future products. It also brings to light issues with other manufacturers in the supply chain.
I think the CT scan tech is cool and the article is written nicely but I don't get the point of this article. Seems like if Anker were using the CT scanner, they still wouldn't be able spot the change. I'm confused.
Even though this is a recall, a bad thing, it actually makes me more likely to buy from Anker than a no-name brand on Amazon. Those no-name brands almost definitely have problems like this (or worse), but we rarely hear about them.
I have two of these powerbanks, one ordered in 2019 and another in 2021. Amazon sent me scary emails saying these things will kill me. Anker's recall site says I'm not affected and the product is safe to use.
I'm not sure who to trust, but I've erred on the side of caution and trashed the batteries. Because it's not worth dying in a fire over $30 in batteries.
Note that they have another recall for other models going, though their language for those sounds somewhat less dramatic compared to what they used for the PowerCore 10000. More of a "covering our assess" recall than a "holy shit we might be liable for lots of damage" recall.
They also moved from a toroidal SMPS to an integrated PMIC for voltage regulation - but that was likely for cost/weight reasons but also hints at being able to more accurately measure and limit the charge or discharge current as a function of the cell temperature. This design is typically less efficient (generates more heat for the same output) so that strongly hints that the overheating issue was not from the pcb/electronics directly and from the cells themselves.
The addition of what I assume is a temperature sensor on the cell in the new design also points to the addition of some charge/discharge regulation based on the active cell temperature that wasn't present in the original model.
Moving from busbar to insulated leads also suggests some recurring issues with bus bar short/contacts but was probably not the cause of the overheating issue as busbars usually have lower resistance and higher current capacity.
If I had to guess I would say the recall was very likely due to cell overheating on high discharge (PD in/out) in high temperature or high insulation (in a backpack or in the sun) situations where there was no thermal feedback from the cell to the controller and the cell was outside of the specification temperature. Thermal runaway is a known issue with lipo cells and can cause cell rupture and combustion.
I've had tons of other packs that have gotten too hot to touch during high charge/discharge and that have "pillowed" up (there is an entire amusingly-named subreddit for shaming cells that have done this... /r/spicypillows) and that is without putting them in a backpack or other insulating environment, or doing so in high ambient temperature. I think anker is likely singled out in the recall because of their size and not necessarily that they made a worse powerbank than most others... but that is only anecdotal based on how many off-brand powerbanks I've seen fail in the same way (bluehive, inui and safuel specifically, to name names) without any recalls or sanctions.
Interestingly from the photo of the device on the recall notice [3], this device doesn't include the C3 mark, which is the regulatory approval marker for inside China.
In the last couple of weeks, there's been a lot of noise [1] about how the regulations [2] about carrying power banks on planes in China got a lot stricter and any powerbank without a C3 mark is prohibited on-board, regardless of size, also any device with the C3 mark that's subject to a recall.
Given the timing of these two events, I suspect that there's some relationship.
I have recalled S/N powerbank which was bought in another country Anker shop.
Unfortunately Anker doesn't allow me to participate recall because I have no buy proof. How many people keep those for powerbanks?
They have Anker stores in my country, however there is no way to exchange it in any way. I would be happy to at least have some discout on a new bank, but no.
I have a recalled Anker battery sitting on my stoop, lest it burn my house down. Who on earth (NE USA ideally) will accept this for safe disposal / recycling? Normal battery recycling places don’t want a recalled battery, natch. Serious question, pls help
Got a recall notice about my few-months-old 20.000mAh Anker power bank from Amazon, went through Anker's verification process and found out that the S/N of mine isn't in the range of affected devices. Dodged a bullet there, also from past experiences [1] with the company their return/replacement process works well.
[1] e.g. BT earbuds where one side randomly stopped working after a few months, got a replacement after just a few minutes of explanation/verification hassle.
It was fun to explore the CT scan on my own, then read the article to see what was actually identified, and go back to the scan to find those things myself (despite the limitation of having scans from only one unit -- it was still great!). Initially, I thought there were no details of insides of the battery units, but after adjusting the settings, I was able to see the internal layers!
For some reason I received a recall notice for one of these from Amazon but I don't recognize it and could not find any purchases in my order history. I vaguely recall my wife might have bought something like this years ago as a gift for some one else but our accounts aren't linked.
What went wrong inside recalled Anker PowerCore 10000 power banks?
(lumafield.com)502 points by walterbell 21 July 2025 | 294 comments
Comments
This is one of the Chinese reports on the issue: https://m.thepaper.cn/newsDetail_forward_31048287
Excerpt from the report above (translated using Google):
> The Paper learned from an insider that Anker Innovations' battery cell supplier is already a leading battery cell supplier in the industry, and did not inform customers after it changed materials. In addition to Anker Innovations, the supplier also cooperates with leading power bank brands, so the impact is huge. Although Anker Innovations did not name the supplier, an insider pointed out that the supplier was Amprius.
UPDATE:
There's an exclusive interview by 36kr with one of Anker's VPs:
https://m.36kr.com/p/3365435892680709
Second, Anker is one of the few companies I actually have a very high trust for. A few years back I bought a wall charger[0] from them, it has 2 USB-C and a Type A. A month in, one of the Type-C ports wouldn't charge if the other port was being used. If you send a support ticket they annoyingly give you a response with very basic trouble shooting. But if you respond to that you get a person. They just sent me a new one right away (<10 days) and there was no need to return the charger or anything. So I still use it, just blocked the bad port. I gotta say, whenever I encounter good customer service I become loyal.
I wanted to say this because I think a quality matters. Quality often takes nuances and this can often run counter to maximizing profits (Lemon Markets and all that). Looking at Luma's report, I don't get the indication that they had this issue because they were cutting corners but looks like it must be upstream[1]. But am happy to see they were giving gift cards along with the recall. Companies should minimize mistakes as best as they can, but it is important to judge them by how they handle mistakes. It can be easy to get caught in the negativity but I personally don't think I'll stop buying Anker products.
[0] https://www.amazon.com/dp/B09Q52CXX1
[1] https://news.ycombinator.com/item?id=44639759
I've been overly cautious of batteries for several years now, I charge my devices with 1A charger and keep it between 40% to 80% . I now carry a single 18650 cell power bank instead of those 10,000 mAh, 20,000mAh power banks.
I don't sleep with phone, tablet or kindle on bed and I force my partner to do the same to her irritation. Last week her MacBook became spicy overnight and I had to rush to Apple Store morning, the price for battery replacement was more than the price of that MacBook in used market so I had to buy a new MacBook.
I miss the good old days where I could take the battery of the Nokia phone and spin it on the table to see if it's become spicy. I pray to EU gods to please force the manufactures to bring back user replaceable batteries.
[1] https://www.reddit.com/r/spicypillows/s/fMNcm07aT2
The recall is concerning, especially since once they started with the one, they quickly added several more to the list. I've ordered at least 17 Anker products over the last ten years (not all of them power banks). I pay the premium over cheaper external batteries, and I have advised my family in the past to do the same. This is ostensibly because they are supposed to be the guys that don't explode. If I can't even take that for granted, then there's really no reason to maintain customer loyalty. There are countless other, cheaper brands available online from no-name Chinese companies.
I'm not sure who to trust, but I've erred on the side of caution and trashed the batteries. Because it's not worth dying in a fire over $30 in batteries.
https://www.anker.com/rc2506
The addition of what I assume is a temperature sensor on the cell in the new design also points to the addition of some charge/discharge regulation based on the active cell temperature that wasn't present in the original model.
Moving from busbar to insulated leads also suggests some recurring issues with bus bar short/contacts but was probably not the cause of the overheating issue as busbars usually have lower resistance and higher current capacity.
If I had to guess I would say the recall was very likely due to cell overheating on high discharge (PD in/out) in high temperature or high insulation (in a backpack or in the sun) situations where there was no thermal feedback from the cell to the controller and the cell was outside of the specification temperature. Thermal runaway is a known issue with lipo cells and can cause cell rupture and combustion.
I've had tons of other packs that have gotten too hot to touch during high charge/discharge and that have "pillowed" up (there is an entire amusingly-named subreddit for shaming cells that have done this... /r/spicypillows) and that is without putting them in a backpack or other insulating environment, or doing so in high ambient temperature. I think anker is likely singled out in the recall because of their size and not necessarily that they made a worse powerbank than most others... but that is only anecdotal based on how many off-brand powerbanks I've seen fail in the same way (bluehive, inui and safuel specifically, to name names) without any recalls or sanctions.
A) Keep using it, even if they do hear about the recall
B) Throw it in the trash can
In the last couple of weeks, there's been a lot of noise [1] about how the regulations [2] about carrying power banks on planes in China got a lot stricter and any powerbank without a C3 mark is prohibited on-board, regardless of size, also any device with the C3 mark that's subject to a recall.
Given the timing of these two events, I suspect that there's some relationship.
[1] https://www.travelandtourworld.com/news/article/flying-with-...
[2] https://english.beijing.gov.cn/latest/news/202506/t20250628_...
[3] https://www.anker.com/a1263-recall
[1] e.g. BT earbuds where one side randomly stopped working after a few months, got a replacement after just a few minutes of explanation/verification hassle.
Should be 710,000, right?
i say it's a release asap and fix design issues over time, cheaply.
basically the Google school of hardware products.
> we don't know exactly what flaw triggered this massive recall