Use old laptop battery for Power bank

If your laptop/notebook or netbook has been changed the battery unit with the new one. don't waste the old battery unit although it doesn't work anymore. Because generally inside the battery unit, not all the battery cell are bad. even in more case, in the battery unit that has 6 battery cells only one or two battery cells have malfunction. One cell has a problem, it will cause the battery unit becomes malfunction.

Use the cutting pliers to rip the battery cover, or you have the other way, up to you.
Take out all the batteries, generally has model 18650 battery, be care full don't make short circuit.

You have to know the polarity which Positive and negative

Use the 18650 battery charger to know it still can be charged or not, you can see the LED indicator, if not charging means the battery is bad.
(You can buy 18650 battery charger from online market, from Aliexpress the price below 2 dollars)

Can be used for Power Bank

There are many Powerbanks in the market have real capacity not the same as they write in the specifications, the real is below what they wrote.

You can build your own Power Bank with best capacity using old battery from your laptop, because original battery from laptop has best quality.

You must have the Power Bank case, you can buy from anywhere. In the Aliexpress store there are many model of Power bank casing for sale, buy the case for the 18650 battery model. with 5 or 6  batteries. The price is not expensive.

Example Power Bank with 6 batteries

Use the batteries already selected from old laptop battery
See the polarity positive and negative, don't make a mistake. In all Electronic devices using the battery, the battery terminal with 'spring' is negative.

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Replying older message in WhatsApp

In WhatsApp conversation when you want to reply or answer to the older message, you don't need to re-write or copy paste that message. You can do with the simple way.

Here is the trick:

- Tap and hold the older message that you want to be the topic
- Then Click the Reply icon (Android) or Reply text (iOS)

'Reply' icon on Android

'Reply' on Ios

The screenshot of that message will appear above the cursor, now you can write or answer the message.

Solve Generic Power bank Fault

I have generic power bank made in China  with 6 batteries model uses 18650 type battery.
It was fault, couldn't be used, couldn't be charged.

I opened the case, and found the problem.
It happened because the electric from battery didn't go to the circuit.
I looked for the reason, and found there was a broken component, it is like the fuse, or electric limiter.
The solution is: I  take a small wire as new component and soldered it to change the function of broken component.

See the figure :

First I opened the case, remove all the Batteries, and take out the Board (PCB)

The broken component is showed in the red circle , click on the picture to enlarge. Its function is to limit the electric current.
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How to Disable Auto Update Android App

Application update may be important, but some time  it will disturb you if it comes at the wrong time.

You can disable App auto update. When the auto update is off you can do the update manually in other time.

To disable Auto Update the application in Android :

1. Go to Play Store
2. Tap the menu icon

3. Select My apps & games

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How to Run Command line as Administrator in Windows 10

To run the Command line/command prompt as administrator in Windows 10 :

• Click search icon.

• Type Command in the search box.
• You will see the result: Command Prompt at upside, right click on it.
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How to know iPhone 4 or 4S Quickly

Between iPhone 4 and 4S look like the same, somewhat difficult to distinguish each other visually from the outside physically.

To know quickly which one  iPhone 4 and which one  iPhone 4S from outside physically, visually :

Look at iPhone from upside
See the figure below :

Easy way to know iPhone 4 or 4S

You can see the difference position of line/stripe of each iPhone.

How to Remote Windows using iPhone

You can do Remote Desktop Windows computer using your iPhone. Although the screen is small in the iPhone but you still be possible to work on it, because you can use zoom in  to make the area bigger.

The requirement to make possible remote your Windows computer using your iPhone :

1. The Windows computer (desktop, laptop or netbook) and the iPhone must be connected to the same Wi-fi (the same wifi SSID). It means the computer and the iPhone connect to the same network.
2. On the Windows computer must be enabled  the Remote access and set permission for remote user.
3. If the Windows firewall is active, it should be add the exception for remote desktop access, or turn off the firewall.
4. You have to know the IP Address (Internet Protocol address) and the computer name
5. On the iPhone you must  install The Remote Desktop Windows application  that can be downloaded from the App Store.
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