I bought this to help mitigate voltage fluctuations caused by my laser printer. The printer was connected to my battery backup (UPS), and the UPS would need to revert to battery power to support the printer as it warmed up for printing. I tried bypassing the UPS and plugging the printer straight into the wall but still had the same problem. While one option might have been to move the printer to a completely different room, i.e., on a different circuit of my home's wiring, this was not practical for me. I think these events may have shortened the battery life of my UPS.
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