When nothing helps, you will need to drill the frame at the lock position to destroy the bolt of the lock. See picture below:
The lock is always in the lower part of the frame (3 cell version, for a 2 cell version it is in the middle) and in a distance of ca. 11,3 cm from the bottom (key hole is there) of the frame.
As soon as the bold is destroyed you can get the modules out of the frame.