Hi An Alien,
May I ask do you have any warranty with HP? I remember working on a computer once, forgot the brand name of the computer.....doesn't matter. It had a similar problem to yours where no matter what battery I installed on the computer, the computer says to replace the battery. After rigorous troubleshooting, it turned out to be a connection on the motherboard. I guess the battery connection that is connected to the motherboard or something. I called the manufacturer of the computer, ship them the laptop, and they replaced the motherboard. Afterwards, the computer worked fine and the battery worked successfully as well.
May I ask do you have any warranty with HP? I remember working on a computer once, forgot the brand name of the computer.....doesn't matter. It had a similar problem to yours where no matter what battery I installed on the computer, the computer says to replace the battery. After rigorous troubleshooting, it turned out to be a connection on the motherboard. I guess the battery connection that is connected to the motherboard or something. I called the manufacturer of the computer, ship them the laptop, and they replaced the motherboard. Afterwards, the computer worked fine and the battery worked successfully as well.