Rechargeable Electric Pencil Sharpener by TihooPower ApplyPowered by rechargeable lithium battery and it comes with a USB cable which can charge the battery quickly. Use more than 300 times sharpening after 2 hour charging. Heavy Duty Blade & Fast SharpenWith the heavy duty ultra durable helical blade, it takes only 3 5 seconds to sharpen. This pencil sharpener gives you up to 4000 times of sharpening without wearing out. Rechargeable Pencil SharpenerNo need to change batteries and you can take it