How to diagnose Dyson 225403 vacuum battery

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How to diagnose if vacuum battery is the reason for the Dyson cutting out:

1. Fully charge the vac (at least 3 to 4 hours, preferably overnight).
2. Once charged, you will do a time test with the vacuum set to MAX, so get out your smartphone and set the stopwatch function for time to 0:00.
3. Start the vac and with it running, press the MAX button at the back of the unit until it starts flashing blue.
4. Start the stopwatch.
5. Run the vac until it stops.
6. Take note of the time.
7. Check your results:
   • With the unit set to MAX and a full battery, you should get about 6 minutes of run time. You don’t need a new battery. Something else might be an issue, so call Dyson.
   • If you get 3 minutes of run time, you need a new Dyson 225403 vacuum battery repplacement. Perhaps not now, but likely within a few weeks or months, depending on how often and for how long you use the machine.
   • If you get less than 3 minutes of run time, your battery needs to be replaced. This was the case with mine—I got less than 2 minutes.
8. Recharge the Dyson V7 animal battery a little again and reset the MAX button to off (no blue flashing light around it) so that it doesn’t inadvertently remain on MAX once you get the new battery and install it.