This one is good for beginners to build up vocabulary with clear pronunciation.
diàn bào : telegram diàn chí : battery diàn gōng : eclectrician diàn huà : telephone diàn liú : electric current diàn nǎo : computer diàn shì : TV
This video (see at YouTube) is of beginner level difficulty. It has subtitles in English, Pinyin and Chinese characters. We especially recommend this video.