Faster battery drain on WiFi


macrumors 6502a
Original poster
Mar 20, 2012
Is anyone experiencing a faster battery drain when you use your watch exclusively on wifi?

I used the watch when I went out yesterday exclusively on bluetooth. 100% off the charger and 60% when I got home at 8pm (moderate use). I was quite impressed with the batt life. I wanted to use the wifi functionality at home for faster response so I turned off my iPhone's bluetooth and put the watch on charge.

I removed the watch from the charger at 100% at 11PM and woke up 7 hours later at 70%. I continued the use of my watch and 3 hours later I'm at 58% (its barely 10am) with little to no use aside from notifications.

Is it safe to assume that the watch uses more power on WiFi? and does the watch constantly search for my iPhone's bluetooth signal even if they can communicate on the same WiFi network?

Just an observation. Any watch owners out there who can corroborate?


macrumors 68040
May 18, 2009
I definitely think i noticed the same when i turned off bt on my phone. Its possible that the watch contually searches for a bluetooth signal like how your phone battery drains if you have bad reception and it constantly searches for a good one.


macrumors 65816
Jun 30, 2004
Of course. Wi-Fi uses about 10 times as much power as Bluetooth so you'll definitely experience much quicker drain if you force the watch to only use Wi-Fi.
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Varth Dader

macrumors member
Dec 21, 2011
Wait, u mean the more features I use the more it drains the battery?! WTH?! Thannks, Apple!


macrumors regular
Jul 6, 2007
Telluride, CO
WiFi uses *MUCH* more power than Bluetooth LE. This makes sense. Situations where it's WiFi only and isn't using more battery than BTLE would suggest there just isn't much data transfer going on so it's not needing to use more power.
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