Using this battery will damage your Dyson
929982
Had to return this battery. When I used it with my Dyson the vacuum operated much more loudly, had more vibration, and then the motor began to give off a burning smell. I would stay away from this replacement battery.
720453
it is a good idea but the battery won't stay plugged in, when attached the vacuum head makes the power unit surge and eventually stop the batery won't charge eather batery is bad or the charger i don't trust the refutbishing job ,never again
4506589
I purchased the vacuum less than 2 years ago, and already the battery cannot hold a charge. If the vacuum is left unplugged for only a day or two, the battery drains substantially.  What good is a cordless vacuum if it cannot hold the charge?

BTW, is there any recourse for this problem?
776685
I purchased this battery in mid January of 2011. I charged it and used it twice in my Roomba. Upon trying to use it a third time I found the battery was dead. I thought it might have become seperated from the docking station and so I adjusted it and left it to recharge. Again and again i tried to recharge this battery even moving to a different outlet and onto different flooring. Nothing worked and it will not keep a charge anymore. My return window apparently ended 30 days after receiving the item. Since I only run my Roomba about once every two weeks, the battery apparently was aware of the return window ending :(. I now have a very expensive paper weight.
2570821
The Dyson DC35 is a great vacuum for not-too-serious clean-up.  The 6 minute run time on high has been doubled with this second battery.  That's 30 minutes with two batteries at low.
update:  not so happy now.  The charger light never goes off indicating a full charge, difference in something requires a jiggle to get it to charge, and it just started intermittently stopping when vacuuming. Ya, it works, but it's not the flawless OEM performance.
Update: it quit taking a charge and died.  a real POS for the money.
2945619
Bought this Vac on Saturday, 1-12-13. Just found out battery is not replaceable. Goes back to store for refund on Monday, 1-14-13.

There is No excuse for not being able to replace the battery. Obviously Electrolux executives consider this a throwaway product for anyone foolish enough to buy it. They make much more $$$ selling you a completely new unit then if they had a replacement battery. Don't fall into this "Throw-Away" mentality trap promoted by many manufacturers of cordless appliances!

Call the manufacturer before purchasing any battery powered device and determine if you'll have to throw it away when the battery gets weak. Seek out products with easily replaceable batteries or continue to throw your money "Down the Drain" !!
1830958
This is not a good handheld vacuum cleaner.  I would love to return it, but am past the deadline.  When it runs it sucks everything just fine, however the battery is the worst.  It won't hold a charge and you can not use it while it's plugged in.  I would recommend looking elsewhere for a handheld vacuum cleaner
4421907
After these batteries destroyed my unit by melting and leaking battery acid I called Neato and found out that these are NOT genuine Neato products and could your unit to fail or never work like mine. I am lucky that these batteries didn't catch on fire.
DO NOT BUY THESE!
Before buying your replacement batteries contact Neato and find out where you should buy them.
127947
This battery makes my laptop more useable when away from an outlet and increased the battery time from 2 hours to 7.  It protrudes below the bottom because it has twice as many cells and allows air to help cool.  Time will tell how long this battery lasts.  I've only used it a couple of times since purchase.

Well, time will tell.  October 11, this battery is toast.  It cuts off and shuts down the laptop at will.  Microsoft warns "There is a problem with your battery. Your computer might shut down suddenly."  My fault I guess.  With battery warranties around 18 months to two years, why would anyone buy one with only a 30 day warranty.  Beware!
3376249
Don't by this battery it will be a waste of your money.  I bought it and it died about 2 months later. Sucks!
2462167
Cheap battery is a danger to equipment and people. Acid leak killed my camera and gave me a terrible rash.
857803
The battery stopped holding a charge after 7 months of use. After getting a replacement battery (at my own expense), the unit still stops spinning the brush randomly. Not the dyson quality I expected.
1705558
Completely disgusted. We have had the vacuum for three months and the powered attachments stopped working. After troubleshooting I determined (confirmed with Dyson support) that the head unit needs to be replaced. We have not even used this vacuum more than 12 times since we bought it for quick pick-ups and use a corded Dyson as our main vacuum. I registered the vacuum with Dyson and received a 2-year warranty. I was told by Dyson support that the part was not covered since they considered it normal wear and tear. Really??? Apparently the plug wears out??
645344
This battery worked great for right at 11-12 months, and we only use our Dyson maybe once a week. Now it won't stay charged for more than 30-45 seconds. It looks like others have had the same issue with longevity. Disappointing..

**update**
Powerextra contacted me right away and sent me a free replacement. This new battery appears to work much better, so for now changing my rating back to a 4.
3191550
Not a good battery! My first Roomba battery lasted 4 years before it started losing running time. This one is only lasting for about an hour per charge after 18 months. Total ripoff!
168576
Had this battery for 6-months and it refused to take a charge.  Walnut Creek would not accept return/replacement, nor would they honor the 2-year warranty. Hoover will also not honor the warranty because they say Walnut Creek is not an authorized seller of this equipment.
A good deal this is not.  Best to order replacement battery direct from Hoover.
177377
Battery was in a UPS that was plugged into a surge protector that was, in turn, plugged into the wall.  We were using the UPS only to power our cable modem and wireless router.  Our internet went down during the middle of the day.  Upon inspection, I found the UPS  wasn't functioning.  I opened it up to find the brand new battery leaking fluid everywhere.  Ridiculous.  Not only did we lose the money spent on the battery but the UPS is now completely destroyed.