PPRuNe Forums - View Single Post - Why do A330 and other types have an APU battery?
Old 21st July 2012 | 09:10
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TURIN
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Same battery as the main batteries on many a/c. Which is handy if one of the main batteries fails down the line without a local spare available.


As the OP states, not all a/c have a seperate APU battery.
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