I'm always wary about buying aftermarket rechargeable batteries as their performance has often been disappointing. For this reason, even when my costly DC35 packed up with likely battery problems I hesitated to buy a replacement non-genuine battery. In the end however I took a chance, as it was the only possible way to prevent a very expensive piece of high-tech plastic going into landfill (Dyson no longer offer spares for this model, which is very poor). I did not have high hopes but I must report that the vacuum is up and running again as well as it every did. I haven't measured battery life - I don't go in for marathon 40 minute vacuuming sessions, I just use it here and there and all I can say is it is still on its first charge. So that's a win.
Verified purchase: Yes | Condition: New
I bought two of these batteries, cells were fully charged but would not power the motor and only 1 blue flashing continuously. I ended up taking apart and was not impressed. I changed the circuit board and now battery is a good one. As for the second battery, although it seems to be ok apart from charge light never going out even when fully charged, i am going to change the circuit board in that as well. I don't feel i can sell the vacuum with confidence with the battery as it is. To some up, don't buy these batteries.
Verified purchase: Yes | Condition: New
Replaced the original Dyson 1300mAh battery with this 4000mAh version and am very happy I did. Previously when putting the vacuum on Max power I’d get around 3 mins before it went dead, but now I can hoover the whole house on max and it doesn’t run out, I’ve not managed to get the battery to run out yet. Dyson purposefully put awful weak batteries in their original vacuums so each year they could bring out a new version which “lasts longer” with just a slightly more powerful battery to force people up upgrade, don’t be fooled, just replace the battery in yours and it’s like the latest model
Verified purchase: Yes | Condition: New
I've been meaning to buy a replacement battery for my DC31 for years and have never got around to it. It was stop and go as to whether it would turn on and work when the button was pressed and eventually it stopped working all together. This replacement battery did the trick and now the DC31 works every time when the button/trigger is pressed. The terminals on the original Dyson batteries are flimsy and eventually give way, making for a terrible connection. So if you have the problem I had, just buy a new battery instead of trying to fix it yourself. Wish I had bought this sooner!
Verified purchase: Yes | Condition: New
This battery pack is slightly different to the original supplied with the cleaner, but fits the same and is working fine. It appears to be a more intelligent battery pack with some form of power level built into the blue LED's on the pack.
Verified purchase: Yes | Condition: New
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