At various dealers are available battery clips for contacting 9-V block batteries.
These batteries also carry the designations 6LR61, AM-6, 6F22 or PP3.
They have contacts that looks like snap buttons with different sizes.
These batteries have only a small capacity. Therefore, the connection wires of the clips are only designed for a small current and are quite thin. For electric consumers taking in a higher current, they seem unsuitable. The thin wires produce a relatively high voltage drop. However, I wanted to use a battery holder that only has contacts like on a battery clip. Since the intended electric consumer, here a transceiver, draws a lot of current, another solution had to come from.
When one open one of the available clips, two contacts appear on a thin supporter. First remove the thin wires from the contacts. Then you solder new thicker wires on it. At the end, you isolate the supporter with the soldered wires. I used self-amalgamating insulation tape for this. It is enough to cover the soldering points and fix the wires.