My Dyson V8 was purchased in 11/22 as a Christmas gift.  We didn't start using it until 1/23. On standard power, it will run for 20-30 minutes. As soon as we switch to high power, it stops working in 1-2 minutes.  This just started happening in the last couple of months.  I don't really think it's the battery since it works properly on standard power. It's almost like something is shorting out the battery on high power. Pretty sad this is happening after only 2 years.