Answer to "The power keeps cutting out after a few seconds"I suspect it is the battery protection circuit cutting in. This circuit monitors the battery voltage. After the motor is first started, the battle voltage will drop due to the load of starting up the motor. The circuit allows a second of so for the voltage to recover. If the voltage does not recover in this period, it shuts down the motor on the assumption that there is a fault that is drawing too much current and will cause the battery to explode into flames. As batteries age their internal resistance increases and they take longer to recover from the startup load. Things like cleaning the filters etc. will reduce the startup load and this will temporilary solve the problem. As you can see from the first few seconds that motor runs OK, there is nothing really wrong with the machine (or in fact the battery except that it is slowing down a little in its middle age.) The real problem is the design of the protection circuit. It is too simplistic in monitoring approach and is causing thousand of Dysons owner...