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i have never seen a large battery fan i have seen the ones about 9 inches that you put in your car why not get one of them charge a car battery keep it the house problem solved my tip deserved best answer. lolOther Answers (6)
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Seen a very BIG one here, but wasn%26#039;t battery driven, used human power. forget what they call them, but it consists of a large 1m x width of room blade hung from the ceiling and a linking mechanism on the side. Some poor bugger, stands there pulling a rope which swings the blade back and forth. Works a treat! Silent (well very quiet), slow moving air, ventilates the whole room evenly without causing a disturbance. Seen modern versions as well with the person replaced with a geared small electric motor. But the human powered one is better for the environment and creates employment opportunities. I understand they were quite popular in India under the British colonial rule.
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Go to an outdoor equipment store, and you can find a limited variety in most. Also batteries produce electricity anyway, but they do it with toxic chemicals. Thus battery powered devices are typically worse for the environment.
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I wouldn%26#039;t bother. It takes more energy to charge a battery than the energy it would take to run a fan directly so unless You are going to charge them from solar power etc. your%26#039;e not going to save energy.
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There are not any big battery operated fans out there trust me I have looked but the eletcric ones don%26#039;t use up alot of wattage so it really wouldn%26#039;t matter you would probably waste more money on batteries that electricity.
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You will be unlikely to find one.
The power needed to operate one that size would be too expensive to run on batteries. -
Battery operated fans don%26#039;t realy come in munch bigger size then you found (even though it would be a smart move).