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I 100% agree.
The internal battery compartment doesn't make much sense for the following reasons:
1- A battery leak could destroy the radio.
2- It is not easy and probably not a good idea to be opening up the case all the time due to the layout.
3- The internal AA's only provide 1/2 power. I like to use an external lipo4 battery pack, see no reason why you couldn't make an external AA one either if you must use AA's.
2, and 3 I view as inconveniences, but 1 is a serious concern, enough so that I don't even use the internal compartment.