It can be especially tricky to understand this when your phone’s auto-brightness has been turned off. Or, at different times of the day, your phone appears a lot brighter for no real reason.Īre you confused about why your phone’s brightness keeps dimming or brightening randomly? You notice that your screen appears darker while you’re using your phone. Let’s jump right in! What Causes Your Phone’s Brightness to Change Even When You Turn Off Auto-Brightness? So if you want to learn all about how to keep your phone from changing its brightness, then you’re in the right place. These features include night shift mode, power saving mode, attention aware, true tone, and auto lock feature. Therefore, our end result was similar to those achieved when using a high-contrast theme alone.ĭrawbacks: Dark screen, lower performance.īattery Life Increase: +19 minutes or 9.Here’s how to fix your phone changing its brightness despite auto-brightness being turned off:ĭepending on whether you’re using Android or iPhone, you may have accidentally enabled certain features (other than auto-brightness) that cause your phone to change brightness automatically. It turns out that when you use a high-contrast theme, Aero effects stop working and the brightness is naturally low, which makes these settings unimportant. When we combined the above approaches by lowering the brightness to 0 percent, turning off special effects, switching to a reverse-text high-contrast theme, and throttling down the CPU, we did not see any additional benefits our battery runtime time reached 3:30, a gain of 19 minutes (9.9 percent). Either way, this is a hard setting to recommend.īattery Life Increase: -3 minutes or -1.5 percent Perhaps if we were doing something more CPU-intensive, like playing a game, we’d have gained some endurance at the expense of performance. In fact, battery life declined by a negligible 3 minutes from 3:11 to 3:08. However, you can go into the Control Panel on any Windows 7 notebook, launch Power Options > Change plan settings > Change advanced power settings, and tweak the maximum processor state under “Processor power management” so that your processor’s capacity cannot exceed 25 percent.ĭespite disabling turbo mode in the BIOS and setting its maximum CPU utilization to 25 percent, we saw absolutely no benefit on the Toshiba M505. Some vendors let you can change settings in the BIOS to turn off turbo mode, lower a CPU’s clock speed, or even disable a core. This can potentially save a ton of power.ĭepending on what notebook you use, there may be a number of ways to put your CPU on a leash. But what if most of your desktop were black, requiring fewer pixels to be lit? If you switch Windows to a high-contrast theme, your desktop background and many of the white areas-including white backgrounds on Web pages-will turn black. The more pixels on your screen, the more backlight power is used to light them. You cannot see thumbnails of windows when you hover over an application’s taskbar icon, nor can you peek at your desktop by hovering over the right side of the system tray.īattery Life Increase: +19 min or 9.9 percentĮxtreme Setting #3: Use a High-Contrast, Reverse Text Theme Select “Adjust for best performance” and click OK.Īfter turning off special effects, the M505’s battery life jumped from 3 hours and 11 minutes to 3 hours and 30 minutes, an increase of 19 minutes (9.9 percent).ĭrawbacks: Windows 7 loses a lot of its visual luster and starts looking a lot like Windows XP. Click “Advanced system settings” and then press the Settings button under Performance. To disable all Windows 7 special effects, first right click on Computer in the Start menu and select Properties. If you disable them, you may save a little juice. These special effects look great, but ask a little bit more from your processor. Windows 7 boasts visual features like Aero Glass, Aero Peek, and countless animations. Extreme Setting #4: Decrease Processor UtilizationĮxtreme Setting #2: Turn Windows 7 Special Effects Off.Extreme Setting #3: Use a High-Contrast, Reverse Text Theme.Extreme Setting #2: Turn Windows 7 Special Effects Off.Extreme Setting #1: Turn Brightness Down to 0%.A notebook with longer overall battery life may see an even bigger increase.ĭrawbacks: Screen more difficult to read, but how difficult depends on the notebook.īattery Life Increase: +11 minutes or 5.7 percent When lowering the brightness from 40 to 0 percent on the Satellite M505, the picture remained clear enough for us to read, while the battery life increased by 11 minutes (5.7 percent).
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