How old is each battery and how old is the laptop?
If the battery is over a year, then it's suspect.
If the laptop is over 3 years, then it's suspect as well.
Repair can exceed what a new unit is, so get an estimate.
The battery in my Armada won't charge, and the computer doesn't recognize it under POWER OPTIONS. I've tried a good batery in it and it still won't power up the laptop, nor will it recognize the good battery.
When I press the test button on my battery, the first 2 lights come on but very faintly. You have to cup your hand around it to see them. The good battery: all 5 lights lit up brightly.
Is my mobo shot? (I have no other problems other than the battery)..................