You have to look at the specifications for the outlet and determine the charging capacity. Then research what the charging draw is of the scanner (or other device) and ensure you are not drawing more than the outlet is capacity of safely providing.
***Important*** Be sure that the outlet in the kitchen is not the Ground Fault Circuit Interrupter (GFCI) outlet. If you swap that GFCI out, you are losing your protection for all the outlets along your kitchen counter. (While most folks know this, there are some who may not and its a safety thing, so that's why I'm mentioning this).
As an aside, UL or Underwriter's Laboratories doesn't "approve" anything. They will test "stuff" to determine that it performs in the manner specified by the device manufacturer. If it does, UL will "List" the device accordingly.