My 2nd hand Dyson V6 Fluffy+ needed a new battery as it wouldn't run for more than a couple of minutes. So in July 2023, I bought a new battery direct from Dyson. At the same time, I thought I’d give it a good clean. I put the new battery in and it was fine. For some reason, I decided to put the old battery back in and found it was working well with the old battery too...possibly because of the in-depth clean. Forward to today, I can’t remember if I swapped the new battery back in. I’ve looked at the numbers on the batteries….do these numbers indicate the date of manufacture?

One has 223058-02   and   205069 02/11

The other has only one number:    62350-71/02

So, what do these numbers mean?

The 02/11 looks like it might be a manufacturing date. Is there a date hidden in the other battery’s number - could the date be 1/02, a manufacturing date in 2002?

If the 02/11 is the later of the two, how could Dyson, in 2023, sell me a battery made in 2011?

Thanks for your help