How To Calibrate your Laptop’s & Android’s Battery

Managing the battery usage is a very big aspect of an electronic device in order to conserve the performance of the battery and prolong the battery life. Using as less applications as possible while disabling unnecessary background tasks is on major factor to get a longer life, but what if the screens suddenly went black?

Windows Battery

Why Calibrating?

If you’re taking proper care of your laptop’s battery, you should be allowing it to discharge somewhat before plugging it back in and topping it off. You shouldn’t be allowing your laptop’s battery to die completely each time you use it, or even get extremely low. Using such technique might confuse the battery power meter, as a result you see wrong information how many time is remaining until you laptop hibernate or shutdown. Calibrating definitely the battery won’t give you longer battery life, but it will give you more accurate estimates of how much battery power your device has left and you not run into the problem that your PC suddenly went black because you have a correct percentage left status indicator which shows correct values.

Keep the following in mind before you calibrate:

  • Li-Io batteries don’t take it well to be fully discharged, as explained over here.
  • Some Manufactures have their own ‘rules’ when it comes to calibration, check the manual if your battery needs any calibration or not. If you’re unsure ask me and I might can help you to answer the question.
  • Calibration not needs to be done very often.
  • The calibration process not needs to be done unless there is a problem, which means you get wrong values displayed compared to the actually battery status.
  • Nickel Cadmium based batteries had a memory effect, as a result over a period of time, they remembered lesser battery capacity than rated capacity. To prevent this, it was advised to always fully charge these batteries, this was fixed with Lithium Ion or Lithium polymer batteries.

How do I know whether my battery is the problem?

That’s relativity easy, check if you haven’t any hardware damage or if another battery has the same symptoms. Check if the batteryless laptop won’t turn on while you’re connected to the AC adapter. If you see out of nowhere performance problems, check if your battery doesn’t throttle you.

BatteryInfoView

 

BatteryInfoView from NirSoft also gives you a lot of information about the current status of you battery.

If there’s a problem with the battery itself, a replacement is usually the best option in the long run. Even so, it’s better to be aware of just how much power you do have left.

How often Should You Calibrate the Battery?

You should do it every four – six months (not more) which helps to keep your battery readings accurate but this is depending, some batteries and devices may not require any battery calibration (see above) – check what the Manufacturer says about your device or battery.

Calibrate your Battery

For this process no special tool is required, the operating system brings everything on board in order to do the calibration process on it’s own.

  1. Charge your laptop’s battery to 100%.
  2. Let the battery rest for at least two hours while leaving the computer plugged in. This step will ensure that the battery is cool and not still hot from the charging process. You’re free to use your computer normally while it’s plugged in, but be sure it doesn’t get too hot because you want to cool it down.
  3. Go into your computer’s power management settings and set it to automatically hibernate at 5% battery. You’ll find this option under Control Panel > Hardware and Sound > Power Options > Change plan settings > Change advanced power settings.
  4. Pull the power plug and leave your laptop running and discharging until it automatically hibernates. You can keep using your computer normally while this happens.
Critical battery level
Control Panel > Hardware and Sound > Power Options > Change plan settings > Change advanced power.

If you want to calibrate the battery while you aren’t using the computer, be sure your computer isn’t set to “automatically sleep”, “hibernate”, or “turn its display off while idle”. If your computer automatically enters power-saving mode while you’re away, it will save power and won’t discharge properly. To find these options, head to Control Panel > Hardware and Sound > Power Options > Change plan settings.

Power Plan Settings
Control Panel > Hardware and Sound > Power Options > Change plan
  1. Allow your computer to idle for like four hours after it automatically hibernates or shuts down.
  2. Plug your computer back into the outlet and charge it all the way back up to 100%. You can keep using your computer normally while it charges.
  3. Ensure any power management settings are set to their normal values (defaults).
Balanced Power Plan
Balanced is usually the default Power Plan.

Your laptop should now be reporting a more accurate amount of battery life (in theory), sparing you any surprise shutdowns and giving you a better idea of how much battery power you have at any given time.

One important factor is once you start calibrating your battery to allow the battery to run from 100% to almost empty, then charging it all the way up to 100% again, which may not happen in your normal daily usage.

Calibrating under Android

  1. Leave your phone on until it automatically shuts down.
  2. With the phone still switched off, plug-in the charger and bring the battery back up to 100%.
  3. Unplug your phone and allow the battery to drain completely.
  4. Now plug your charger back in and fully charge your battery once again. The phone should be re-calibrated at this point.
  5. You definitely not need any apps or something in order to calibrate your Android, they don’t have any magical ‘voodoo’ in it which offers any benefit.

Keep in mind that calibrating battery on Android is the same like on Windows, some batteries simply don’t need any calibration at all. Most smartphones etc. coming with Li-Ion or Li-Po batteries which simply don’t need any special calibration.

It’s a myth on Android that resetting the Batterystats.bin file helps, in order words you don’t need to ‘delete’ it. Some Root ‘calibration apps’ often advertise it as ‘feature’. The Batterystats file gets a reset automatically it’s status once you unplug from power with a relatively full charge.

Closing Words

The battery didn’t actually gain any additional charge while doing all this but the calibration helps the battery’s/OS sensor detecting how much capacity was left so you get a more accurate status under Windows/Android. The calibration process is on every OS basically the same and you not need any programs or apps in order to do this. Ensure you also keep the battery as cool as possible, heat is a real problem and might have an negative effect on the hardware itself or results in a shorter lifetime.

Resource

 

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2 thoughts on “How To Calibrate your Laptop’s & Android’s Battery

  1. Good article

    do you know the definitive solution for this problem?

    —> Windows 10 dpi scaling blurry for monitor hi-resolution <—

    I found something around, fixed something but … there are programs that still have problems

    Like

    1. Windows Redstone 4 already changed several things regarding to the ‘hi-dpi problem’. I’m not sure if it’s finally fixed because some drivers also interference in it by e.g. overriding it. No, I have no solution but I haven’t really looked into it, maybe I’ll will and write something about it. Would be something for my ‘lemme fix’ series.

      Regarding to program specific issue you mentioned – that’s usually something the developer needs to fix and change, some application simply use their own API in order to scale rather than the modern Windows API (which might already fixes the problem). There some programs to override it but I not recommend them and in most cases it’s better to contact the developer of the ‘broken’ apps in order to fix this for everyone.

      https://support.microsoft.com/en-us/help/3025083/windows-scaling-issues-for-high-dpi-devices

      Like

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