This is an irregular verb. It follows the conjugation pattern of the verb chegar.
Present:
A Ana carrega o celular todas as noites.
A Ana carrega o telemóvel todas as noites.
Ana charges her phone every night.
Preterite:
O Miguel carregou as caixas.
Miguel carried the boxes.
Conditional:
(Eu) carregaria isso para você.
I would carry that for you.