Formal — to staff
Cafe · Charging
You
すみません、携帯電話を少しだけ充電させてもらうことは可能でしょうか？
すみません、けいたいでんわをすこしだけじゅうでんさせてもらうことはかのうでしょうか？
Excuse me, would it be possible to charge my mobile phone for a little while?
Romaji: Sumimasen, keitai denwa o sukoshi dake jūden sasete morau koto wa kanō deshō ka? / Reply Romaji: Hai, daijōbu desu yo. Achira no seki deshitara konsento ga tsukaemasu.
Reply
はい、大丈夫ですよ。あちらの席でしたらコンセントが使えます。
はい、だいじょうぶですよ。あちらのせきでしたらコンセントがつかえます。
Yes, that's fine. You can use an outlet at that seat over there.
Gesture & etiquette
Hold up your phone or charger to clearly indicate what you wish to charge.
Always ask for permission before plugging in any device. Do not monopolize an outlet for an extended period, especially during busy hours. Be prepared to be told no, as not all establishments allow charging.