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Is this UPS a fire hazard? (europe.pub)

submitted 4 months ago by Magnetic_dud@discuss.tchncs.de to c/ece@lemmy.world

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The batteries in this UPS lasted less than a year. It was because those battery were "no name" batteries, or because they were connected in series directly to the AC after the transformer? Shouldn't they have a rectifier and condenser before that? It seems that in this way the battery is connected to AC 24/7

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