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Impact on iPhone Battery Life?

D

dogcowdaddy

macrumors newbie
Original poster
Jul 9, 2007
17
4
With all the concern about the battery life of the Apple Watch, I was wondering. What will be the impact of having the watch in continuous communication with your iPhone be on the iPhones battery life?

See you at 3am Eastern on 10 April.

Jim
 
Probably not significant. I've been using a pebble watch for more than a year now and haven't had any battery concerns from it. In fact, the pebble app uses so little power that it doesn't even show up on my battery usage screen.
 
BrettDS said:
Probably not significant. I've been using a pebble watch for more than a year now and haven't had any battery concerns from it. In fact, the pebble app uses so little power that it doesn't even show up on my battery usage screen.
Click to expand...


this ^^



although I can imagine there will be initial stories that peoples phones die quicker...what they forget is that they will be using the phone more often in order to 'play with the watch'. In normal use, I expect no change in phone battery life
 
I bet it will actually improve your iPhone's battery life because you won't be turning the screen on just to read a text or check the time dozens of times a day.

Also the watch is out on the 24th, not the 10th, unless you are planning on camping outside an Apple store just to see one.
 
The iPhone's screen uses more power than anything - the Watch means you'll be using the screen less.
 
dogcowdaddy said:
With all the concern about the battery life of the Apple Watch, I was wondering. What will be the impact of having the watch in continuous communication with your iPhone be on the iPhones battery life?

See you at 3am Eastern on 10 April.

Jim
Click to expand...

when the watch is just "listening" for the phone to broadcast any signal, battery usage is minimal. You can operate this kind of listening behavior for years on a coin cell battery, with Bluetooth 4.0.
 
hemolyzer said:
I bet it will actually improve your iPhone's battery life because you won't be turning the screen on just to read a text or check the time dozens of times a day.

Also the watch is out on the 24th, not the 10th, unless you are planning on camping outside an Apple store just to see one.
Click to expand...

Pre-orders start on the 10th.
 
dogcowdaddy said:
With all the concern about the battery life of the Apple Watch, I was wondering. What will be the impact of having the watch in continuous communication with your iPhone be on the iPhones battery life?

See you at 3am Eastern on 10 April.

Jim
Click to expand...

See you at 9PM Hawaii Time on April NINTH :D:p
 
dogcowdaddy said:
With all the concern about the battery life of the Apple Watch, I was wondering. What will be the impact of having the watch in continuous communication with your iPhone be on the iPhones battery life?

See you at 3am Eastern on 10 April.

Jim
Click to expand...

I use a pair of Beats Studio Wireless (Bluetooth) for 8 hours straight at work and I notice VERY LITTLE difference in the battery life of my phone.
 
I think I have some data on the battery impact on the iPhone. Kuro Labs 'Normal' now lists two new services on iOS 8.2 & 8.3 that may eat substantial battery:

* nanoregistryd - 3h11m ± 1h22m (99% confidence)
* nanoregistrylaun(cher?) - 3h27m ± 1h15m (99% confidence)

Since the nano registry is apparently for the 'Paired Device Registry' I suppose those are for the Apple Watch.

Ref: https://github.com/nst/iOS-Runtime-Headers/tree/master/PrivateFrameworks/NanoRegistry.framework

The high variability ± 1h19m probably means the actual drain depends wether you used some geofencing before, or that your iPhone could drop to full low power mode during screen off time. 2 hours is approximately what a geofencing motion tracking app (such as a step counter) would take.

I do not have an Apple Watch, so I have not seen any drop in actual battery life. It's much the same as on 8/8.1.
 
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