Sorry, I was probably understating its use - I had a professional in mind
when I typed it. The drill has been used at least once every, say, two
week
on average. I have done up three run-down flats over the last three years,
however most of the joinery work was done by a professional, hence my
reference to "rarely used". Probably a full battery use every week say.

That sounds about right for a cheap battery. Fair wear and tear, IMO. You
must consider batteries to be consumable items.

Christian.