?? Usb Rechargeable: These Upgraded Electric Salt And Pepper Grinder Set Contain 500Mah Lithium Ion Rechargeable Batteries Using A Type-C Usb Cable. This Allows For Automatic Rechargind And Less Hassle Battery Replacement While Saving Money On Regular Batteries. In Addition, You Get A Very Long Standby Time To Support Up To 150-200 Uses. Simply Place The Grinders Back On The Stand And They Charge Automati