Working old '18V' electric drill in box (Broadstone BH18)

This has been sat in a garage for a few years but (not with the supplied battery) it seems to work ok. No drill bits included!
The charger will run the drill using a supplied "dummy" battery which connects to the battery charger.
I'm not sure it would be possible (or worth the cost) to acquire a new battery for the drill, but it may do a job as-is if you can't afford a new one. If no-one wants it then it will just got to the recycling skip. We are in Broadstone.