I have a hand held D7 with an annoying problem. After the battery is fully charged I pick up the machine and start to vacuum. It then cuts out after 20 - 30 seconds. I put it back on charge for a few minutes and then use it again. This time it will run for the full time expected. This happens every time. I have no pulsating and all the lights show up as there is not a problem and the battery is charged. Any ideas?
[Moderation edit - title updated]