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When we receive a new laptop or notebook, the first question comes in everyones head is How Long Should I Charge My Laptop battery for the first time?. When you ask with your friends or others you may get different answers like 8 hours, 12 hours, 24 hours, etc..

I too had the same question when I got my first laptop and the same question worried me till I found the great article on HP Pavilion Notebook PCs support. As far as I understand from the article, We can disconnect the laptop charger whenever the charging reach at 100%.

In this post I included the link to the official article "Understanding Lithium-Ion and Smart Battery Technology" by HP Pavilion Notebook PCs support and directly included one of the answers in the same article which helped me most to clear the confusion.

How does the notebook charge the battery?
Adhering to recommendations by battery cell suppliers and best practices, the notebook does not continue charging the battery once the battery is 100% fully charged. Once the battery is 100% fully charged, the terminate charge bit is set, preventing the battery from charging. The battery does not clear the terminate charge bit until after the fuel gauge falls below 94%. Once the battery fuel gauge falls below 94%, the charge bit is set and the battery does begin charging with the AC adaptor connected to the notebook. If the AC adaptor is disconnected between the levels of 94% to 100%, the charge bit will not be set and the notebook will no longer charge the battery.

Read here the complete Article by HP Support
Or
Download the Article as PDF

Before open keyboard, 2 tools we have to prepare. Sharp knife, and screwdriver.


Step how to open keyboard 
We only need 4 step to open keyboard compaq Cq43
1. open battery then open case, look at the picture


2. open screw in hole, look at picture


3.  On keyboard, there are 4 key. you have to slide. look at picture.



4. finish,
open connector between motherboard and keyboard.


If you sucessfull open keyboard, i sure that you can place this keyboard..
leave comment if you get trouble.. thanks..