Review on 🔋 Efficient Electric Pencil Sharpener with USB/Battery Power, Included Batteries, Automatic Start-Stop - Ideal for Colored and No. 2 Wood Graphite Pencils! Perfect for Home, Office, School, Classroom, Kids - Helical Blade by Carol Miller

Adjustable sharpness (although I only use extreme ones), auto-off, stable. A beautiful stone-like finish. The transparent lid of the document compartment is just a lid, so you need to open/empty it over the bin. Some slippery pencils can be difficult to hold to prevent the pencil from spinning instead of sharpening. Make sure you're using a USB charger with enough current (2.1A+) but also one that doesn't trip on overcurrent (just limit it) as the sharpener may not seem to be working and just not have enough juice Has. (The batteries also need to be fairly fresh for the sharpener to enjoy grinding.)