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chapset said:
My modem light is always on so no biggy

Actually, electricity leaching from electronics like broadband modems and routers are quite significant.  A broadband modem, for example, leaches as much electricity as a 32" LCD TV in a year.  Can't find the article, but just read it yesterday.  It was an interesting read.

Bottom line is, no, 3 PCB mounted LEDs aren't going to consume a significant amount of battery.