If by outdoors you mean coffee shops and so on, it's fine. But yeah in the open it is bad, like most cell phones etc. I don't consider that a common use case. I

If by outdoors you mean coffee shops and so on, it's fine. But yeah in the open it is bad, like most cell phones etc. I don't consider that a common use case. If you do field work, get some shade behind/over you. Plenty of reasons for that.