Review on 🖊️ LD Products Electric Pencil Sharpener - Battery & Wall Powered for Professional, Home, Office, and School Use - Compact, Sturdy, Heavy-Duty, Child-Friendly, with 3 Adjustable Sharpening Settings by Jennifer Roberts

I bought this for my home work station because the nib width can be adjusted (I sometimes use colored art pens) and because the pens insert vertically for one-handed use. Everything worked as advertised with the included power supply. I ran into a problem when trying to run on battery power. The supplied batteries were not installed and the battery cover was not closed when the batteries were installed. I double checked that the polarity of the elements is correct and that they are intact. When I assembled everything, the sharpener was not running on battery power. So I left the batteries and just snapped the battery cover open. Because the sharpener's location has an AC power source and is the only place I need to use it, there's no need for a portable battery. If I had such a need, I would return it.