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texaslabrat	2009-09-22 , 21:24
Posts: 271 \| Thanked: 220 times \| Joined on Sep 2009	#385

Originally Posted by Saturn

I don't remember where I read it, but ~2mW was the difference in the consumption if the BT was simply on instead of off and if receiving-transmitting should be ~1W. Could be really wrong though.

In any case, 2.5mW doesn't look like a realistic number for something transmitting/receiving. .

Depends on the class of bluetooth.

Class 2 has a maximum permitted transmission power of 2.5mW. Class 1 is 100mW. Either way, it's a lot less than the 3G radio's power. But that makes sense...bluetooth is generally talking to something in the same room...3G is talking to a tower hundreds of meters (or more) away.

http://en.wikipedia.org/wiki/Bluetooth

And has been noted...these numbers reflect the amount of power being radiated by the antenna...the underlying chip logic generating the signals consume energy in addition to that.

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