2nd battery does not seem to be a viable option, reduce the suction power if u require less and it should work for 25 minutes approximately. (hope u know it automatically stops when dust the cup is full)
Thanks for making contact and I'm sorry you're having difficulty.
I would suggest that this is a blockage of some kind as the pulsating is caused by a lack of airflow (the motor is protecting itself by pulsating and then ultimately cutting out).
I would recommend looking at the following video which will take you through a methodical way of checking this. The model in the video is a DC59 but applies to most cordless models: https://www.youtube.com/watch?v=fdnu4yk-5vI
Furthermore, I would check the bin inlet to make sure that the one-way door/flap is not jammed as this also can cause the problem.
If you continue to have difficulty, please give the Dyson Helpline a call on 1-866-693-9766 (US), 1-877-397-6622 (CA), 0800 298 0298 (UK). Our experts will be happy to talk you through some further diagnostic checks when you have your machine easily to hand.
DC59 will display a blue indicator light at the base of the hand grip while the machine is taking in power. The light will go out when the machine is fully charged. DC59 will take 3.5 hours to charge fully when the charge is completely depleted, but it will take less time than this if there is still some charge remaining on the battery after use.
Please note, the machine's intelligent control software is designed to ensure the battery only takes in enough power to recharge, and to keep itself topped up. It's safe to leave the machine connected to the charger at all times when not in use - the machine is designed to be stored in this way, so it's always ready to go when you need it.
From the information you've provided, I'm not clear on whether or not you're finding your DC59 works as normal once the blue charging light goes out, or whether it's not working at all. To make sure everything is correct, please get in touch with our experts directly. We'll be happy to talk you through some simple diagnostic checks when you have your machine easily to hand.
You can reach the Dyson Customer Helpline by calling 1-866-693-9766 (US), 1-877-397-6622 (CA) 1800 239 766 (AU), or 0800 298 0298 (UK).
I would suggest getting in touch with Dyson directly to run through some checks while you have your machine with you.
The Dyson Helpline is available on 1-866-693-9766 (US), 1-877-397-6622 (CA), 0800 298 0298 (UK). Our experts will be happy to talk you through some further diagnostic checks when you have your machine easily to hand.
In order to confirm why your DC59 is behaving in this way, we would need to take a few further details from you - including whether or not your machine pulses on and off before shutting down, and whether it displays any solid or flashing coloured LED lights.
When you have your machine easily to hand, please call our freephone UK Helpline on 0800 298 0298. Our experts will talk you through some simple diagnostic checks to pinpoint the cause of the issue. If they determine that a replacement part is needed, they'll also be able to confirm if you're still within your free Dyson 2-year parts and labour guarantee.
We'll look forward to speaking with you. Just to let you know, we're available from 8am-8pm from Monday to Friday, and 8am-6pm on weekends.
If your Dyson cordless vacuum is pulsing on and off with the filter in place, the filter may need a wash. I'd also strongly recommend checking the bin inlet, wand and motorised floor tool for any blockages, following the steps shown in our video guide:
When you check the bin inlet, make sure the bin inlet flap is able to open and close freely, and that no debris is jamming it in place.
I'm confident this will resolve the issue. If you'd like further assistance from our experts after giving this a try, please call the Dyson Customer Helpline on 0800 298 0298 (UK), 1-866-693-9766 (US), 1-877-397-6622 (CA) or 1800 239 766 (AU). We'll be able to talk you through some simple diagnostic checks when you have your machine fully charged and easily to hand.
I'm sorry to hear your DC59 doesn't seem to be charging. If you're recharging your machine in the docking station, make sure the end of the charger cord is correctly and firmly inserted into position. If the charger cord is not correctly installed, it may not be making effective contact with the machine. In normal use, DC59 should recharge from depleted within 3.5 hours.
If you're plugging the charger cord directly into the machine and have continued to experience this issue, please get in touch with the Dyson Customer Helpline directly when you have your machine to hand. Our experts will be happy to talk you through some simple diagnostic checks - and if a replacement part is needed, they can confirm if this is covered under your Dyson warranty.
You can reach us by calling 0800 298 0298 (UK), 1-866-693-9766 (US), 1-877-397-6622 (CA) or 1800 239 766 (AU).
Our User guides are largely graphic-based, and we don't currently offer a version of the DC59 User guide in braille. However if there's anything we can help you with, you're very welcome to get in touch directly. Our experts would be happy to talk you through assembling, using and maintaining your DC59, and can answer any questions you have.
Just give the Dyson Customer Helpline a call on 0800 298 0298 (UK), 1-866-693-9766 (US), 1-877-397-6622 (CA) or 1800 239 766 (AU).
The end of the charger cord assembly which attaches to the machine itself is held in place securely by a friction-fit connection. You should be able to use something like a flat-bladed screwdriver to free the end of the charger cord from the docking station. Then with the docking station removed from the wall, you should be able to disconnect the charger cord completely from the rear of the dock, following the route shown in the image below:
I hope this helps - if you'd like any additional advice you're welcome to give the Dyson Customer Helpline a call on 0800 298 0298 (UK), 1-866-693-9766 (US), 1-877-397-6622 (CA) or 1800 239 766 (AU).