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[硬件] 关于某宝某鱼上热卖的手持暴力吹扇，电源问题想多了解

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比如说 21700 电池组的版本，知道是两枚，不知道是并联还是串联，应该是并联吧？
店家提到，电池瞬时需要放流到 30A ，25C 以上，不是一般电池能承受的，所以不支持用户自行更换电池... 想 DIY 了，那么请问，是否有一种电源适配器，可以 AC220V 转换出（可调） DC3V ～ 12V ，但电流能 40A 的电源？

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