battery charger
Noun
Meaning
a device that can hold a rechargeable battery by means of an electrical cable
Source: WordNetSynonyms
Hypernyms
Examples
But the tech forgot to install the battery charger receptacle.
The Anker PowerCore Slim, as the name suggests, is a thin, sleek, and ultra portable battery charger.
I use this when I have to bring my battery charger or charging something more than my phone.
You can also have a battery backup system that can run the pump and the battery could be connected to a solar battery charger.