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Answer Posted / kyu kyu win
1 ) to supply the stable Voltage output
2 ) to standby or backup protection .
Like mother look after her child
Mother = Battery Charger , Child = the whole control,
Metering and Backup
3 ) AC have frequency problem ( changes )
4 ) DC have not.
| Is This Answer Correct ? | 2 Yes | 9 No |
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