HP-25 Battery replacement

Instead of breaking the plastic holder at the usual place to remove the dead batteries (cutting the middle plastic strip at the batteries side), I prefer a different approach.

The battery holder is made of two plastic pieces welded together at factory. So to open it on the original place we can use a X-acto knife and lots of patience to not destroy the plastics.

After inserting a new set of batteries, the back cover can be glued to the case.