Building and external laptop power supply?
The 14.4 battery is dead.
Refurbished and used batteries cost $80.00 usd and up with zero guarantees.
I fear trying to replace the cells because opening the battery is not straight forward plus the electronics inside my be frelled any way.
My solution is do do what I have done in the past and make an external supply.
battery X n = desired voltage.
In this case 18.5v is what I need to power it from the external supply input and the numbers don't add up.
Now I am brain dead when it comes to basic electronics so my question is how do I resist 21v to the required voltage?
Or better yet 24v to 18.5v so I could use alkaline or rechargeable batteries.