5. About 6-8 hours for battery being fully charged.
6. Put switch on AC position for the fan works as a normal fan; Put switch on DC position to be an emergency fan(fan can still running when your house was no power)
7. Duration about 2.5 hours high speed when AC power failure, and about 4 hours low speed.
8. AC 110V60Hz/220V50Hz & 2 flat/round plug (any requirement available).
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