nick205
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| posted on 3/3/23 at 03:25 PM |
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Dyson V7 cordless vacuum - battery failed?
Afternoon all,
Have a Dyson V7 cordless vacuum cleaner. Excellent to use and been very pleased with it.
Despite charging it (on the charging dock it came with) the run time decreased from around 30 minutes to now not working.
I've removed the battery pack and tested across the charging input contacts with a multi-meter and get 2-300 milli Volts. The rating on the
label is 21.6 Volts.
Questions
1. Is my multi-meter test valid and indicating a worn outbattery pack?
2. If not, how else can I test it?
Not wanting to spend out £65 on a new (genuine Dyson) battery without some certainty thats the problem.
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David Jenkins
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| posted on 3/3/23 at 04:17 PM |
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Some advanced battery management systems won't show the full voltage unless all the connections are made properly - but I doubt even Dyson would
be that fussy.
There is a high probability that the battery is knackered. Do you have access to another battery as a comparison?
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nick205
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| posted on 3/3/23 at 04:45 PM |
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Not another Dyson battery, only AA rechargeable batteries. Looking at the size/shape of the Dyson battery pack I suspect it's 6 x 18650 cells
inside it.
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daviep
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| posted on 3/3/23 at 10:04 PM |
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Replaced our V6 battery with a generic one from amazon approx. £40 and has lasted way better than the original, been in use for for 5 years now.
Branded "flylinktech" however you pay your money and take your chance with that kind of stuff.
Regards
David
“A truly great library contains something in it to offend everyone.”
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russbost
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| posted on 4/3/23 at 10:55 AM |
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A voltage test means nothing without having a substantial load on it, if the voltage was holding up under load then it would be working
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nick205
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| posted on 4/3/23 at 11:11 AM |
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daviep
Noted.
I've ordered from Amazon "BATOOL".
Higher mAH rating £33.
Arriving Tuesday, will report success.
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nick205
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| posted on 4/3/23 at 11:12 AM |
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russbost
Noted also.
No obvious way of getting a load on it and testing. Too much plastic!
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JoelP
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| posted on 4/3/23 at 02:05 PM |
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Mine is an amazon replacement too. Its been perfect.
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nick205
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| posted on 6/3/23 at 09:06 AM |
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My Amazon purchase "BATOOL" Dyson V7 spec. battery pack arrived yesterday afternoon. Unpacked and all seemed good, it looked right, the
spec. label read correct and it fits correctly. Fitted it to the vacuum and it worked (ggod start). Instructions advised to charge, so it went back
in the Dyson charger. To be tested vacuuming this evening when I get home from work.
All looking good so far.
Time will tell how well it performs and lasts!
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nick205
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| posted on 22/4/23 at 03:25 PM |
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Some extra feedback...
The purchased battery didn't do the job. Worked for a few minutes then back to pulsing and no performance.
Returned and refunded no issue.
Flylinktech (as recommended above) now on it's way from Amazon. Last chance then it's new (corded) vacuum time.
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nick205
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| posted on 25/4/23 at 06:11 AM |
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Flylinktech battery + replacement filters arrived yesterday. Fitted and been charging overnight.
Testing later today.
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Slimy38
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| posted on 25/4/23 at 07:14 AM |
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Ours pulses when it needs a clean. Every month or so I have to strip it down and give it a clean with my garage Henry, then it'll carry on
working.
I find them very irritating to be honest, but my wife loves it. I'll stick to my 'so much suction it lifts the carpets' Henry. 
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Russell
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| posted on 25/4/23 at 07:45 AM |
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quote:
Originally posted by nick205
Some extra feedback...
The purchased battery didn't do the job. Worked for a few minutes then back to pulsing and no performance.
Returned and refunded no issue.
Flylinktech (as recommended above) now on it's way from Amazon. Last chance then it's new (corded) vacuum time.
Pulsing means the airflow is blocked. When the battery is failing it'll run for a few seconds then cut out.
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coyoteboy
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| posted on 25/4/23 at 08:01 AM |
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We used a fleet of V7's in work for lightweight spot cleaning duties. Batteries all lasted a year or so and then failed. I'm really not that
impressed by battery tools I'm afraid, too fussy and too failure prone in general.
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geoff shep
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| posted on 25/4/23 at 11:18 AM |
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quote:
Originally posted by nick205
Some extra feedback...
The purchased battery didn't do the job. Worked for a few minutes then back to pulsing and no performance.
Returned and refunded no issue.
Flylinktech (as recommended above) now on it's way from Amazon. Last chance then it's new (corded) vacuum time.
Yes, I don't think pulsing in itself is a battery issue (which may also be worn out) - it is usually due to a blockage somewhere. Search for
Dyson V6 pulsing eg: https://www.youtube.com/watch?v=0Sfafk4FljM
You can check it easily by just removing the central filter and seeing if it will run.
You can get replacement filter sets which help. We have also replaced the battery when it wouldn't hold any charge and for another got a higher
capacity battery which is heaps better as it will now run for at least double the time. We also had to replace the charger - which can also be made
to fit into the original housing.
[Edited on 25/4/23 by geoff shep]
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nick205
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| posted on 25/4/23 at 01:46 PM |
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quote:
Originally posted by coyoteboy
We used a fleet of V7's in work for lightweight spot cleaning duties. Batteries all lasted a year or so and then failed. I'm really not that
impressed by battery tools I'm afraid, too fussy and too failure prone in general.
Have to agree - I'm not a great fan of battery powered things myself. Cordless drills seem to work OK, but most other things are pretty fussy and
failure prone.
As I mentioned above my aged Samsung corded vacuum still goes like stink and will happily have a go at peeling carpet off the floor.
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Prof_Cook
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| posted on 25/4/23 at 07:33 PM |
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Had same problem - (pulsing then turning off) turned out to be blockage in the detachable "head". Not easily visible but found when tried
to push a cable tie past the motorised bar sweeper into the centre of the "head" outlet.
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nick205
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| posted on 26/4/23 at 09:31 AM |
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quote:
Originally posted by Prof_Cook
Had same problem - (pulsing then turning off) turned out to be blockage in the detachable "head". Not easily visible but found when tried
to push a cable tie past the motorised bar sweeper into the centre of the "head" outlet.
BINGO - BINGO - BINGO!
Tested my Dyson V7 last night with Flykintech new battery, both filters replaced (motorhead pull out and motorhead rear screw on) and the long wand
with detachable head.
Pulsing then turning off - aaaargh not again surely!
Removed pull out filter and it ran full pelt, perfectly OK.
Removed the wand with detachable head. Dismantled detachable head (7 Torx screws) and unclogged it (massive clod of carpet fluff and SWMBO + daughter
hair). Reassembled the detachable head and reassembled the wand to the vacuum.
Retest and all running 100% with no pulsing and sucking very well.
Finally a happy chap (very annoyed I didn't do the detachable head before though).
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Prof_Cook
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| posted on 26/4/23 at 02:20 PM |
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Glad you didn't have to buy a new vac...
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nick205
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| posted on 26/4/23 at 04:29 PM |
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You and me both, money better spent on other things.
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scudderfish
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| posted on 26/4/23 at 04:43 PM |
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quote:
Originally posted by Prof_Cook
Glad you didn't have to buy a new vac...
That would suck.
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McLannahan
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| posted on 27/4/23 at 01:53 PM |
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quote:
Originally posted by scudderfish
quote:
Originally posted by Prof_Cook
Glad you didn't have to buy a new vac...
That would suck.
At least the old one wouldn't sit in the corner gathering dust....
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