how to check how much life is in a battery?
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['Measure the no load voltage of the battery by connecting directly to the leads fo the multimeter. ... ', 'Connect a 4.7 ohms 5W resistor across the battery and quickly measure the voltage drop across the resistor. ... ', 'Calculate the battery internal resistance.', 'Calculate the maximum current it can deliver.']
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Click Start button and type cmd into the dialog box and hit enter. Next, type powercfg /batteryreport and hit enter. The Design Capacity is the original strength of the battery and the Full Change Capacity is performance you are currently getting.
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A fully charged battery will typically display a voltmeter reading of about 12.6 to 12.8 volts. If your voltmeter is showing a voltage anywhere between 12.4 and 12.8, that means your battery is in good shape.
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Just press and hold until you hear a chime, then say what you need. To check the Fuel Gauge, which shows battery level and charging status, press and release the power button.
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To view the current status: Hold down the Alt/Option key. Click the battery charge icon at the top right of the desktop near the clock. After the Condition heading at the top of the menu you'll see one of four battery status messages: Normal, Replace Soon, Replace Now, and Service Battery.
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[' It will not turn on. This is definitely the most obvious and easiest way to determine if your battery has simply had enough. ... ', ' Only showing signs of life when connected to a charger. ... ', ' Dying fast even after fully charged. ... ', ' Overheating. ... ', ' Battery bulging.']
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['Hold down the Alt/Option key.', 'Click the battery charge icon at the top right of the desktop near the clock.', "After the Condition heading at the top of the menu you'll see one of four battery status messages: Normal, Replace Soon, Replace Now, and Service Battery."]
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To check the battery charge level. From the Home screen, tap the Apps Key > Settings > Battery. The battery level (as a percentage of fully charged) and the battery status (Charging or Discharging) is displayed at the top of the screen.
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['Swipe down from the top of the screen to bring down Notification Center.', 'Scroll down to the Batteries sections.', 'Read the charge level for Magic Keyboard.']
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Check the Batteries widget by swiping from left to right from your first Home screen page. If you don't see a Batteries widget, scroll down, tap Edit, and press the + symbol next to the Batteries icon.
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Hold the Option key and click the Apple  menu. Choose System Information. Under the Hardware section of the System Information window, select Power. The current cycle count is listed under the Battery Information section.
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The life expectancy for your car battery is typically between four to six years. Several factors determine how long your battery will last, for example weather conditions, vehicle type and driving habits. There are, however, several key pointers you can utilise to help increase the life expectancy of your car battery.
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You can also check the battery life at any time by swiping to the right on the Home screen to open the Today view of the Notification Center. There's a battery widget that lists the battery life of the ‌iPhone‌, the case, and other attached devices like AirPods or the Apple Watch.
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To check the condition of your MacBook's battery, click on the battery icon in the menu bar. You will see one of four conditions: Normal: The battery is functioning normally. Replace Soon: The battery is functioning normally but holds less charge than it did when it was new.
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In Windows 7, Windows Vista, or Windows XP, click the battery icon in the Windows Notification Area in the lower-right corner of your screen. The pop-up window also indicates if the laptop is plugged in and the battery is charging.
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You can check the remaining battery charge of the rechargeable battery. When you turn on the headset by pressing the button, the indicator (blue) flashes two times, then the indicator (red) flashes. You can check the remaining battery charge by the number of times the indicator (red) flashes.
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Head to your Settings, then click on Battery. A list of apps will appear below with their respective percentages of battery usage for the last 24 hours or seven days. In the upper right hand corner, you'll find a clock icon. Click on that, and the time you spend using the apps will be added beneath their names.