I was told that pacemakers in bulk are considered 'hazardous cargo'. The energy delivery ability of their batteries is small, though - a few milliamps at most, purposely in case it goes wrong. Back some 30+ years ago, there were some plutonium powered pacemakers and thus the 'hazardous cargo' designation, even though such pacemakers haven't been made since the early 1980s.

The energy in a single pacemaker battery is still significant. If any person who has a pacemaker is (post mortem) to be cremated - the pacemaker has to be removed beforehand.

The battery can explode inside the cremation chamber with such force that it can damage the firebricks. And this is not a joke. Every funeral director will ask the question of the family when cremation is specified.

A lot of drones use Li-Po batteries.They pack in a large charge in a small space for weight saving,and they are more dangerous than Li-ion batteries.

The results of shorting out a charged Li-Po battery are pretty spectacular.
Plenty of videos online showing the results.

I'm sure the IATA Dangerous Goods Manual would distinguish between radioactive and non-radioactive versions. I don't have a copy to hand but I would doubt that an entire product range would bear the designation of the most dangerous iteration.