![]() We charged each pack to its full capacity. Performance-wise, the knockoffs were okay. ![]() When we asked Dyson for a rundown of the differences, a spokesperson gave us a vague “we always advise against using anything other than genuine Dyson parts,” and “third-party batteries often do not conform to safety standards and can be dangerous-they also often suffer from inferior performance.” Our educated guess is that the knockoffs are missing some charge and discharge monitors and controllers, and a few safety monitors. We can’t tell what all of the Dyson microcontrollers do-we searched for part numbers printed on the Dyson components and couldn’t find them for sale. Some Dyson packs do fail within a year (in which case they’re covered by the warranty), but our sense from reading Amazon reviews and talking to people who have bought knockoffs is that they often fail after just a few months.įinally, the third-party packs are missing some of the elements that you’ll find on a genuine Dyson battery control board. Photo: Lee Johnsonīasically, the cheap packs aren’t likely to hold up to regular wear and tear like the genuine pack. The assembly on the PowerExtra is exceptionally shoddy (note the liberal use of silicone foam), and uses mostly the same off-the-shelf components as the Dsanke pack. The Dyson board has more components than the others (probably charge and discharge monitors and some safety controls) and a coating to keep away dust and moisture. The Dyson pack, meanwhile, uses cells from Murata, a major lithium battery supplier.īattery control boards for (left to right) the genuine Dyson battery pack, the PowerExtra knockoff pack, and the Dsanke knockoff pack. Without getting too deep into the details of battery safety certifications and regulations, the takeaway is that lower-quality cells could cause performance problems, have shorter lifespans, or possibly pose some safety risks (the Consumer Product Safety Commission has a list of potential hazards, and The Atlantic has some horror stories). Maybe they’re salvaged and relabeled (possibly damaged or depleted) cells, or they could be true counterfeits, without the same quality-control and built-in safety features as the brand-name cells. Or, at the very least, they weren’t labeled like any known cells from big-name suppliers (such as Samsung, LG, Panasonic, and Murata, among others), which do quality-control tests to make sure the cells conform to industry safety standards and perform predictably. The most important difference we found was that the knockoff packs used no-name battery cells. When we opened up the packs, it was obvious that the knockoffs were of a much lower quality than the genuine packs. More importantly, they may pose some safety risks. ![]() He found that although the third-party packs run the vacuum fine (at least while they’re new), they are “cheaply made battery packs” that “for sure won’t last as long” as the genuine Dyson packs-and probably not even long enough to make their low price worth it. ![]() We hired Lee Johnson, who has 10 years of experience designing and testing electronics (including a stint at NASA), to test and dismantle a few replacement battery packs for the Dyson V7. If you’re looking to replace the battery pack on your Dyson cordless vacuum, we think your best bet is to skip the knockoff packs you can find on Amazon or AliExpress, and stick with the genuine Dyson packs-as painfully expensive as they are.
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