Exactly - a consistent use of the term.
The Lee Enfield 'charger' is fitted into the 'charger bridge' and the result is charging the rifle with ammunition.
The Battery 'charger' is fitted into the 'charging port' and the result is charging the appliance with electricity.
(A 'Charger' is also a large plate / dish and a 'War Horse')
I don't see the difficulty in using the word that the designers, specifiers and users of a piece of equipment gave to that piece of equipment.