This Tech. demonstration is to raise awareness that laptop batteries can easily be replaced with any other kind providing it is of correct, or sufficient, voltage. Here I am using two 6V. batteries rigged up to provide twice the voltage to power a Compaq Armada 110.
*Depending on your laptop warranty this may void it!*
Before reading this Instructable, I recommend reading this one first!!
For this you will need to take your old laptop battery apart, The battery I used was very stubborn and I only got it apart with considerable cosmetic damage, For taking it apart try starting by the contacts where the battery connects to the laptop, I have not got any proper pictures of this step as I did it about 1 month ago, and I only just un-earthed the battery casing, Once you have got a little bit of the battery casing prised up things will either be easier or a bit more difficult, the Compaq battery was fused together so I was practically just breaking plastic!
After you have got the battery apart you will find around 9 battery cells depending on the type of laptop battery. You will need to rip all these chunky batteries out, making sure not to rip the wire leads to the batteries off the circuit board (pic. 2)