Review on DmofwHi USB Rechargeable Electric Cordless Coffee Grinder With 304 Stainless Steel Blade And Removable Bowl - Grey by Douglas Jakab

The biggest problem with this unit is that the battery doesn't seem to be powerful enough to grind a full canister and the motor often overheats and ceases. My most recent issue occurred this morning after charging the unit for 24 hours (almost forgot, charging the unit takes an inordinately long time), the unit stopped after a few seconds. After three or four additional attempts, the unit became very hot and the battery started flashing. The whole process was over in about 3 minutes. No problem. I'll just wait another sixty minutes for the device to recharge. I strongly suggest using a wired or hand grinder. This one simply does not have the juice.