Thanks for the reply.
£80 for a replacement battery is a lot.
I'm not sure about rechargeable large tech at the moment.
Reminds me of a portable hedge trimmer I bought, between summers the battery died, and the replacement cost was more than I paid for the whole unit when it was on offer.
Think I'll stick to my mains vac and the inconvenience of carting it up and down the stairs.
The battery is bizarre. Seen a few reviews saying it gave out in a year and a half.
I've never had an issue with a Lithium battery before. Maybe it's the high power draw?
Again, might just be bad luck. Might try a random brand if a good offer comes up on black Friday