When you get this vacuum, it only has about 30% battery power, before you first use it, please use the original adapter to charge for 4-5 hours fully. After fully charged, the vacuum will work up to 45 mins on standard mode, 15-20 mins on Max mode.
#2 What is the input voltage of the charger? Does it work on 220V?
Yes. The power adapter of this N5T cordless vacuum ceaner can apply to 100-240V.
#3 The HEPA filter comes with a mesh wrap around it with a little blue tab. Do I leave that on or remove it before use?
Please leave it on. When cleaning, you can remove the mesh wrap, and the mesh and steel drum can be washed with water. The HEPA filter should be cleaned dry with cleaning gadget. Ensure the filters are completely dry before refitting.