If your Windows 10 device has a built-in battery i.e., it’s a laptop or a tablet, you can check how much battery time is left. All you need to do is hover your mouse over the battery icon in the system tray. A tool-tip will tell you how much of your battery is full and how long you can use your device before it shuts down. Sometimes though, as is common with Windows 10, its features tend to disappear and the battery time estimate can go AWOL. If it’s missing on your system, here’s something that might fix it.
To fix the missing battery time estimate, you need to edit the Windows registry and that requires admin rights. If you have a pending Windows 10 update to install, particularly a major feature update, simply installing it might fix the problem. If you only have routine security updates pending, you can try this fix because a security update isn’t going to fix problems in the Windows registry.
Fix Missing Battery Time Estimate
Open the Windows registry by typing regedit in Windows Search, or by typing it in the run box. Navigate to the following location;
You need to look for a few things here. First, look for a value called EnergyEstimationDisabled. If it’s there, you should delete it. If you’re a bit queasy about deleting the value, you can set its value to 0 and not delete it.
Next, look for a DWORD value named EnergyEstimationEnabled. It ought to be there, and its value should be 1. If it isn’t there, right-click the Power key, and select New>DWORD (32-bit) Value. Name it EnergyEstimationEnabled, and set its value to 1. For good measure, restart your device. The battery time estimate ought to appear.
There’s no telling what might cause these values to disappear or appear. If you’ve ever tinkered with the power plans beyond what the built-in UI controls let you then you might have caused it. If you’ve overclocked your CPU, installed third-party apps to manage power output, or have installed a buggy system monitoring app then any one of them might be the cause of it.
Of course, Windows 10 tends to lose essential features as it goes from one build to another. A major update can fix problems with the Windows registry but it can also create new ones and that may have been what caused the battery time estimate to disappear in the first place.
If you have a battery time estimate but the battery slider is missing, there’s a fix for that as well.