My mac wireless keyboard always shows 100-percent charge when its not

How do I allow my iMac to correctly show the battery level of my Mac wireless keyboard?
It always shows 100-percent, which is wrong most of the time.
It reads and shows my Mac wireless mouse battery level correctly.

It's a bug.

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So I have a brand new imac and the wireless keyboard always switches between connected and disconnected randomly. I have another identical keyboard I bought a few months ago and it works fine. Any energy saver functions that could be doing this?

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My Mac wireless keyboard and and mouse one day disconnected and I can't reconnect. They have new batteries.

Hi Saint Anne,
Happy Thanksgiving Day! Since both of your wireless input devices are not working at the moment, do you have a wired mouse you can use to straighten this out? Here are some troubleshooting steps to try:
Wireless Connection issue
Make sure Bluetooth is turned on
First, choose Apple () menu > System Preferences > Bluetooth and confirm that Bluetooth is turned ON.
The Bluetooth menu bar icon should turn:
Black if Bluetooth is turned ON and no devices are connected.
Light grey with three dots if Bluetooth is ON and at least one wireless device is connected.
Light grey (or disappear completely) if Bluetooth is turned OFF, or if the iMac is unable to communicate with the Bluetooth module.
Refer to the Bluetooth Menu Icon table below for more information on determining the Bluetooth status. If the Bluetooth icon does not appear, or if the menu bar status continues to indicate that Bluetooth is off, restart your computer and then attempt to turn Bluetooth ON again.
Bluetooth OFF
Bluetooth ON and connected to wireless device
Bluetooth menu icon
Bluetooth status
Bluetooth turned on, but there are no devices connected to the Mac. See the "Make sure the wireless mouse or keyboard is turned on" section of this article.
Bluetooth turned on and at least one wireless device is connected. See the "Make sure the wireless mouse or keyboard is turned on" section of this article.
When this icon flashes, at least one wireless device has a low battery. Click the Bluetooth icon to identify the affected device, then replace the batteries.
Bluetooth is off. Click the Bluetooth icon using a USB mouse and select "Turn Bluetooth On". Note: Mac OS X won’t allow Bluetooth to be turned off unless a USB mouse is connected.
Bluetooth offline. Restart your Mac. If the Bluetooth status doesn’t change, disconnect all USB devices and restart your Mac again.
Make sure the wireless mouse and keyboard are turned on.
Mouse
Slide the On/Off switch on the bottom of your mouse to turn it on. Note: If the battery compartment cover is not installed properly the On/Off switch may not function correctly or may be difficult to operate. Remove the battery compartment cover and carefully reinstall it.
When your mouse is on and paired, and the batteries are charged, the indicator light glows steadily.
If your mouse isn’t paired with a Mac, the indicator light will blink, indicating your mouse is in discovery mode and ready to pair.
If the indicator light doesn't illuminate, check to make sure you have two good batteries and that they're installed correctly.
Keyboard
Push and release the On/Off switch to turn on the Apple Wireless Keyboard.
When your keyboard is on and paired, and the batteries are charged, the light will glow steadily for several seconds, then turn off.
If your wireless keyboard isn’t paired with your Mac, the indicator light will begin to blink. This indicates your keyboard is in discovery mode and ready to pair with your Mac.
If the LED doesn't light up, remove the batteries to make sure they're good and that they're installed correctly.
Check preferences
From the Apple () menu, choose System Preferences, then choose Bluetooth from the View menu. The Bluetooth preferences pane will list the Bluetooth devices paired with the computer, the status of the devices (paired or connected), and whether Bluetooth power is on or not.
Click the gear icon and choose "Connect" to connect a device that is powered on.
To set up a new device, click the + icon and follow the Bluetooth setup assistant.
If the Mouse System Preferences pane is open and no wired or wireless mouse is connected, your Mac will immediately start looking for a wireless mouse (with Mac OS X v10.6. For Mac OS X v10.5, the Setup Assistant should open).
Keyboard or mouse intermittently stops responding
Click the mouse
Click the mouse once to reconnect it with your Mac. It may take a moment for the mouse to respond.
Check the battery level of the mouse. Choose System Preferences from the Apple (), then choose Mouse from the View menu. The battery level indicator is in the lower-left corner. Replace the batteries if they are low. Note: Choose Keyboard & Mouse from the View menu with Mac OS X v10.5. For more information on keyboard and mouse battery levels in Mac OS X v10.5, see Desktop computers: Troubleshooting wireless keyboard and mouse issues.
Press a key on the keyboard
Press a key on the keyboard to reconnect it with your Mac. It may take a moment for the keyboard to respond.
Check the battery level of the keyboard. Choose System Preferences from the Apple (), then choose Keyboard from the View menu and select the Keyboard tab. The battery level indicator is in the lower-left corner. Replace the batteries if they are low.
Check for signal interference
Wireless networks that operate on 2.4GHz may cause interference.
Move cordless phone base stations, microwave ovens, and other 2.4GHz electrical devices away from the Mac if you suspect interference.
Keep wireless devices within 10 meters (33 feet) of the Mac.
Avoid putting metal objects between the device and the Mac.
Mouse doesn't scroll up or down or side to side
For mice that have a scroll ball, refer to How to clean your Mighty Mouse.
Check the Scrolling speed slide-control at the top, and make sure the “Scroll” checkbox is checked.
For scrolling side-to-side, make sure the application you’re using supports side-to-side scrolling.
Remember, scrolling is done with one finger, and navigating is done by swiping side-to-side with two fingers.
Navigating moves from page to page in a document or internet browser unlike scrolling.
Mouse does not track as expected (jittery, jumpy, slow, fast).
The Apple Wireless Mouse can be used on most smooth surfaces, however if tracking issues occur try these options:
Choose System Preferences from the Apple () menu, then choose Mouse from the View menu. Set the Tracking slider to adjust how fast the pointer moves as you move the mouse.
Try using a different surface to see if the tracking improves.
Turn the mouse over and inspect the sensor window. Use compressed air to gently clean the sensor window if dust or debris is present.
If multiple Bluetooth wireless devices are in use nearby, try turning them off one at a time to see if the issue improves. Bandwidth intensive devices could affect tracking.
Mouse buttons do not work as expected.
The Mouse preference pane allows users to customize the mouse features to meet their needs.
Choose System Preferences from the Apple () menu, then choose Mouse from the View menu. Set the Tracking slider to adjust how fast the pointer moves as you move the mouse.
Try using a different surface to see if the tracking improves.
Turn the mouse over and inspect the sensor window. Use compressed air to gently clean the sensor window if dust or debris is present.
If multiple Bluetooth wireless devices are in use nearby, try turning them off one at a time to see if the issue improves. Bandwidth intensive devices could affect tracking.
Keyboard has one or more keys that do not respond.
Use the Keyboard Viewer to test whether the keyboard keys are responding correctly when they are pressed.
Choose System Preferences from the Apple () menu, then choose Language & Textfrom the View menu (or International from the View menu in Mac OS X v10.5 or earlier).
Select Input Sources.
Select the Keyboard & Character Viewer checkbox.
Enable the input source for the keyboard layout you are testing by selecting the checkbox next to it.
Make sure that "Show Input menu in menu bar" is enabled.
Choose Show Keyboard Viewer from the Input menu in the menu bar, as shown.
The Keyboard Viewer shows the keyboard layout.
Type the key on the keyboard that doesn’t respond and observe whether the corresponding key highlights on the Keyboard Viewer. If it does, that particular key is functioning correctly. In the sample shown above the shift and command keys are being pressed.
If the mouse keys feature in the Universal Access System Preferences pane is enabled, many of the keyboard keys may not respond as expected.
Try starting up into single user mode to determine whether a software issue is causing the issue.
Cheers,
Judy

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After installing MagicPrefs free drivers, (because Apples' sensitivity settings suck), MagicPrefs show
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From my troubleshooting, it seems it's specific to the individual mouse.
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> Please guide me why it always shows 100% used and what is the performance impact on that
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Just purchased a new mac mini 3GHz Intel Core i7, with 16GB ram version 10.10.1. With it i purchased a new wireless keyboard. All of a sudden I was not able to use the #1 key. I thought I had a defected newly purchased keyboard. I pulled out my older

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My mac wireless keyboard always shows 100-percent charge when its not

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