- 02-09-2012, 08:15 AM #26
- 02-09-2012, 09:05 AM #27
- 02-09-2012, 10:28 AM #28
- 02-09-2012, 12:19 PM #29
No offense whatsoever intended to the poster, but you keep hearing "oh, my 4s gets terrible battery life"...and then you dig a little deeper and find out they have brightness cranked all the way up, they actively use the device for hours with the screen lit, they never turn off Bluetooth (even if they rarely use BT devices), and they have like 40 apps set up for push notifications and using the GPS. All of these things use power!
If you prefer your device on full blast, that's perfectly fine, but there's a trade off for that. If it didn't take power to run the screen, then Apple wouldn't even have bothered to ever dim the screen or have it go to "sleep". It would just be perpetually "on", kind of like a Black-and-White Kindle or something, and run for a month. This is a much more complicated device.
Mine is probably around 35%, or near the "B" in many of the pictures above. I actually would prefer to have it around 50% (at least in well-lit areas), but the way I have it set up right now I've been very happy with the battery life, so I'm keeping it.
Last edited by StormJH1; 02-09-2012 at 12:22 PM.
- 02-09-2012, 09:12 PM #30
- 02-09-2012, 09:51 PM #31
- 02-10-2012, 02:15 AM #32
- 02-10-2012, 05:29 AM #33
- 02-10-2012, 06:36 AM #34
- 02-10-2012, 09:00 AM #35
I used to be an all-the-way kind of guy...but in an effort to maximize battery life, I switched to auto-bright. That way I get to see fine no matter the lighting conditions, but I also salvage some additional battery life. The only time I have any trouble seeing the screen is when I have my polarized sunglasses on....then sometimes I have to move my phone around until I can see it...haha
- 02-10-2012, 11:01 AM #36
- 02-10-2012, 12:04 PM #37
- 02-10-2012, 01:48 PM #38
- 02-11-2012, 01:09 AM #39
- 02-11-2012, 06:57 AM #40
- 02-11-2012, 11:17 AM #41
- 02-11-2012, 12:20 PM #42
- 02-11-2012, 02:39 PM #43iMore Intermediate
- 190 Posts
In the grand scheme of things, the display brightness doesn't make that much of a big deal.
The battery load between lowest and highest screen setting only changes about 100mA. While it will absolutely cause your battery to drain faster, it still doesn't affect the overall battery range as much as using it does.
For example, an iPhone 4S with all of the radios off and displaying a static screen at lowest brightness: 87mA (16 hours)
Same conditions, full brightness: 189mA (7. 5 hours)
The current draw is liner throughout the range, so you can estimate different settings pretty easily.
For perspective, simply typing text into the notes app causes the current draw to climb an additional 300mA, and an additional 25mA if you have keyboard taps enabled.
If you factor in the wifi, cellular, and GPS radios turned on and working, you can start to understand why the battery life is so short with these devices.
It seems counterintuitive that typing a note or swiping your home screen will drain your battery faster than watching a movie, but Apple made the decision (and a good one at that) to sacrifice battery endurance in order to max out the CPU on user interactions. There's a reason why it appears to run so smoothly - and it's not because of special hardware.
Your battery could have lasted longer, at the expense of lags in the user interface.
- 02-11-2012, 04:23 PM #44
- 02-11-2012, 10:05 PM #45
- 02-12-2012, 09:42 AM #46
- 02-12-2012, 09:49 AM #47
- 02-13-2012, 11:31 AM #48
- 02-13-2012, 11:36 AM #49
- 02-13-2012, 12:59 PM #50