Verbseoul.
하다 verb
충전하다chungjeonhadato charge or recharge (a battery or an electronic device)

To say to charge or recharge (a battery or an electronic device) politely in the present tense, use 충전해요 (choong-chuhn-hae-yoh). Below is the full conjugation of 충전하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
충전해
choong-chuhn-hae
충전해요
choong-chuhn-hae-yoh
충전합니다
choong-chuhn-hahm-nee-dah
Past
충전했어
choong-chuhn-hae-ssuh
충전했어요
choong-chuhn-hae-ssuh-yoh
충전했습니다
choong-chuhn-hae-sseum-nee-dah
Future
충전할 거야
choong-chuhn-hahl- -guh-yah
충전할 거예요
choong-chuhn-hahl- -guh-yae-yoh
충전할 겁니다
choong-chuhn-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
충전하세요
choong-chuhn-hah-sae-yoh
Suggestion / Let's Polite (요)
충전해요
choong-chuhn-hae-yoh
Question Polite (요)
충전해요?
choong-chuhn-hae-yoh-?
Connective “and” — (고)
충전하고
choong-chuhn-hah-goh
Conditional “if” — (면)
충전하면
choong-chuhn-hah-myuhn
Noun form — (기)
충전함
choong-chuhn-hahm