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I want to buy a wireless keyboard. However, most do not have LED indicator for numlock capslock and scroll lock. I wonder why.

Mac keyboard has that. Most wireless keyboard for PC doesn't. They can just turn of all those locks when not in used right?

I suspect it's to save power. That's what I suspected. However, it's such a small LED and only show up when the keyboards are actually in use. Also Mac keyboards have LED.

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closed as not constructive by slhck, RedGrittyBrick, KronoS, Simon Sheehan, Journeyman Geek Jul 16 '12 at 7:03

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The LED consumes a suprising amount of power: 20 milliamps. Enough to run your batteries down noticeably more quickly.

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That's what I suspected. However, it's such a small LED and only show up when the keyboards are actually in use. Also Mac keyboards have LED. –  Jim Thio May 29 '12 at 10:46
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I wouldn't say you'll notice the effect, really. Mac keyboards only have a LED indicator for caps lock, so that doesn't really use any power whatsoever EXCEPT FOR WHEN YOU WRITE IN CAPS LOCK ALL DAY ;) @jim –  slhck May 29 '12 at 10:49

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