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Jyutping ng5 hou6 din6 ci4
Pinyin wǔ hào diàn chí

Definitions (CC-CEDICT)
  1. AA battery (PRC)
  2. Taiwan equivalent: 三號電池|三号电池[san1 hao4 dian4 chi2]
Definitions (Wiktionary)
  1. noun, Mainland-China
    AA battery