**Bug introduced in 9 and partially persists through 10.2 or later**

The specific bug described in the original question is fixed (`"Kelvin"` is correctly recognized as `"Kelvins"` now) but as shown in the [answer by Willinski](https://mathematica.stackexchange.com/a/94626/280) there is more involved problem with misinterpretation of `"K"` as `"KelvinsDifference"` in some cases. Please see [this discussion](https://mathematica.stackexchange.com/q/94635/280) for more information on the **temperature difference** units in *Mathematica*.

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I'm trying to use Mathematica units more often, but I've run into the following problem:

```
    (*Define some unitful constants*)
    q = UnitConvert[Quantity["elementary charge"]];
    k = UnitConvert[Quantity["Boltzmann Constant"]];
    T = Quantity[300, "Kelvin"];
    V = Quantity[5, "Volt"];
    (*Do a simple calculation*)
    UnitConvert[(q V)/(k T)]

```

The above code outputs

```
    Quantity[193.409, ("Kelvins")/("KelvinsDifference")]

```

which really should just be 193.409, since the units cancel, but Mathematica insists on a distinction between absolute temperature and temperature differences. I understand that such a distinction is useful in conversions, but the above is quite a nuisance.

Is there a way to prevent this? I'd rather not have to put in `QuantityMagnitude` calls every time I need to cancel some `Kelvins`.

Thanks!