This is the 9079th most frequent Portuguese word.
baterias
"Baterias" in Portuguese means "batteries" (electrical power storage devices) or "drum kits" (musical instruments), depending on context.
In this sentence, 'baterias' refers to batteries, which are small energy storage units used in electronic devices.
Eu preciso trocar as baterias do controle remoto.
I need to replace the batteries in the remote control.
Here, 'baterias' indicates drums, specifically the set of percussion instruments in a drum kit.
Após a aula, tocamos as baterias que estavam na sala de música.
After class, we played the drums that were in the music room.
In this instance, 'baterias' is used metaphorically to mean personal energy or stamina.