However, there’s no harm to performing a calibration, even if the manufacturer says it isn’t necessary. Some manufacturers may even say this isn’t necessary on their hardware (like Apple). Each manufacturer may recommend a slightly different calibration procedure or tool to ensure your laptop’s battery is properly calibrated. You should also look at your laptop’s manual or help files. Check your laptop manufacturer’s website for information on using any utilities they provide. These tools will usually just make sure your laptop has a full battery, disable power management settings, and allow the battery to run to empty so the battery’s internal circuitry can get an idea of how long the battery lasts. Some laptop manufacturers include utilities that will calibrate the battery for you. The battery’s power meter will see how long the battery actually lasts and get a much more accurate idea of how much capacity the battery has left. Recalibrating your battery is simple: just let the battery run from 100% capacity straight down to almost dead, and then charging it back to full. Check your device manufacturer’s documentation to learn whether battery calibration is necessary on your device or not. For example, Apple recommends battery calibration for older Macs with user-replaceable batteries, but says it’s not required for modern portable Macs with built-in batteries. Some modern devices may not require battery calibration at all. When this happens, it’s definitely time to calibrate the battery. However, if you don’t calibrate your battery regularly, you may eventually find your laptop suddenly dying on you when you’re using it-without any prior warnings. In reality, you likely don’t have to do this that often if you’re not too worried about your laptop’s battery readings being completely precise.
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