and I have better than average mechanical skills

My father wanted one of these for his birthday, so I got him one. I don't know if this is a problem with all units, but we found it almost impossible to put the batteries in. If I had had to do it myself, I would never have been able to do it, and I have better than average mechanical skills. My father's father was a mechanic, so my father has very strong mechanical abilities, so he eventually managed to do it.

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