The OEM batteries with portable computers do not last long in high heat areas. I live in a hot climate and I do not want rapid failure of the battery which may in turn cause permanent damage of the motherboard. My intent is to have this machine as a car automation pc. I don't want the heat of the day to compromise the integrity of the system.
This instructable applies only to portable computers with an internal bios or cmos battery. This is a lithium coin cell. Lower cost netbooks rely on the main Li-ion battery for bios and therefore their battery must not be removed!
Step 1: Removing the Battery.
Depending on the model of the portable computer, there is a specific way to remove the internal battery. For my netbook, this is how I did it:
Step 2: Powering Up the Netbook or Laptop.
You can use the OEM AC charger adapter to power the computer or in my case, I used plain old 12Volt DC from a battery. Even though the OEM adapters give approximately 19Volt DC, any netbook will run on 12Volt (laptops may not accept the lower voltage due to higher power demand). I actually successfully ran my netbook off 9Volt as a side experiment!
This proves that if you need a dedicated (and preferably touchscreen) PC to run 24/7, it can be done in a cost effective way using an off the shelf netbook or laptop! The reliability of the DC power source to the computer will of course determine its continued service availability.