While I know that CIQ watch faces can have a greater impact on battery life than the stock watch faces, what I do not know is whether there can be a battery impact from just having them installed but not currently used.
Having them installed has zero impact.(the are just files on the watch)
Using(running) one should only have a minor impact. Some of the more complex ones can have a bit more of an impact than the simpler ones, as will ones that do background communications for the weather, etc.
