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My HP laptop battery does not charge. It only shows 0% available all the time. The following is what I tried to do so far:

1. I installed a BIOS update.
2. I removed the battery from the laptop and opened it and here's what I found so far:

   1. The multimeter shows power on the cells as indicated in the images below:

   2. There's a reading on the VH and VL located on the circuit board:

   3. There's a reading on the VM and VL:

   4. There's a reading on the VH and VM:

      

      No reading on the pins

   5. There might have been a small black component on the board (something fell out when I opened the battery case but I can't find it).

I don't know much about electronic and electronic engineering, but if you can give me any advice on how to fix my battery I would be grateful.

Update: I'm answering the questions in the comments.

My laptop, model HP Notebook - 15-ay031ni (ENERGY STAR), is older than 4 years. I had an experiment where I kept the charger on for a few months to see if the battery would last. I guess my experiment broke it. Is it possible that the "small black component" is causing the current from flowing? I don't think the cells are broken. I think the issue might be on the circuit board. Because there is no current on the pins, I think it might be the missing black components that is causing the issue. Do you agree? How do I fix it? Can I use ones from another battery?

Find below a picture of the circuit board.

My HP laptop battery does not charge. It only shows 0% available all the time. The following is what I tried to do so far:

1. I installed a BIOS update.
2. I removed the battery from the laptop and opened it and here's what I found so far:

   1. The multimeter shows power on the cells as indicated in the images below:

   2. There's a reading on the VH and VL located on the circuit board:

   3. There's a reading on the VM and VL:

   4. There's a reading on the VH and VM:

      

      No reading on the pins

   5. There might have been a small black component on the board (something fell out when I opened the battery case but I can't find it).

I don't know much about electronics and electronic engineering, but if you can give me any advice on how to fix my battery I would be grateful.

Update: I'm answering the questions in the comments.

My laptop, model HP Notebook (15-ay031ni), is older than 4 years. I had an experiment where I kept the charger on for a few months to see if the battery would last. I guess my experiment broke it. Is it possible that the "small black component" is causing the current from flowing? I don't think the cells are broken. I think the issue might be on the circuit board. Because there is no current on the pins, I think it might be the missing black components that is causing the issue. Do you agree? How do I fix it? Can I use ones from another battery?

Find below a picture of the circuit board.

My HP laptop battery does not charge. It only shows 0% available all the time. The following is what I tried to do so far:

1. I installed a BIOS update.
2. I removed the battery from the laptop and opened it and here's what I found so far:

   1. The multimeter shows power on the cells as indicated in the images below:

   2. There's a reading on the VH and VL located on the circuit board:

   3. There's a reading on the VM and VL:

   4. There's a reading on the VH and VM:

      

      No reading on the pins

   5. There might have been a small black component here where the green circle is in the picture (something fell out when I opened the battery case but I can't find it).

I don't know much about electronic and electronic engineering, but if you can give me any advice on how to fix my battery I would be grateful.

Update: I'm answering the questions in the comments.

My laptop, model HP Notebook - 15-ay031ni (ENERGY STAR), is older than 4 years. I had an experiment where I kept the charger on for a few months to see if the battery would last. I guess my experiment broke it. Is it possible that the "small black component" is causing the current from flowing? I don't think the cells are broken. I think the issue might be on the circuit board. Because there is no current on the pins, I think it might be the missing black components that is causing the issue. Do you agree? How do I fix it? Can I use ones from another battery?

Find below a picture of the circuit board.

My HP laptop battery does not charge. It only shows 0% available all the time. The following is what I tried to do so far:

1. I installed a BIOS update.
2. I removed the battery from the laptop and opened it and here's what I found so far:

   1. The multimeter shows power on the cells as indicated in the images below:

   2. There's a reading on the VH and VL located on the circuit board:

   3. There's a reading on the VM and VL:

   4. There's a reading on the VH and VM:

      

      No reading on the pins

   5. There might have been a small black component on the board (something fell out when I opened the battery case but I can't find it).

I don't know much about electronic and electronic engineering, but if you can give me any advice on how to fix my battery I would be grateful.

Update: I'm answering the questions in the comments.

My laptop, model HP Notebook - 15-ay031ni (ENERGY STAR), is older than 4 years. I had an experiment where I kept the charger on for a few months to see if the battery would last. I guess my experiment broke it. Is it possible that the "small black component" is causing the current from flowing? I don't think the cells are broken. I think the issue might be on the circuit board. Because there is no current on the pins, I think it might be the missing black components that is causing the issue. Do you agree? How do I fix it? Can I use ones from another battery?

Find below a picture of the circuit board.