

出かける前に、スマホを充電するつもりです。
この自動車はどこで充電できますか。
昨夜、工具のバッテリーを充電しました。
"じゅうでんする(充電する)" is in the lesson "Engineer" (Level 39), along with 13 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.