Hello,
I have here one interesting problem.
Macbook Pro 15" 2018(820-01041-A)
Laptop comes to me with freezing and rebooting problem. All inside was relatively clean and no water damage. Only visible problem was one swolled cell on battery...all was looking like batt problem.
I have put inside new - not original batt, but problem with freezing still. I am able to boot into os, then pc can run few seconds, then freezes and reboot and reboot until force power off.
Quickly i am able to see battery information...batt is detected normally in os with power cycles hours...

Hi, I have a problem with MACBOOK A1990 - The laptop starts with no image when the battery is connected, but without the battery it starts with an image - however, when using only the power supply, when logging into the system it turns off and resets again.

Battery replaced with another unit → same problem.

ISL9239 replaced → no change.

SMBUS_BATT_SCL / SDA measure ~20-50kΩ to GND with battery disconnected (normal).

Any ideas or advice would be a huge help!
Thanks in advance for your time.​

My question pertains to understanding the control circuity inside a Dell PT434 type battery used in Dell E6400, E6410 and other Dell notebooks?

Does anyone have a circuit diagram for the inside of a Dell PT434 battery and/or a description of how the control lines work to control this battery?

My reason for asking is I have a battery which I cannot get to charge beyond 1% in a Dell E6410 or E6400.
The LED bar graph charge indicator on the battery shows one LED lighted when the info button is pressed.
I have tried multiple different Dell power adapters. My Dell...

Hi guys i have a 820-00840 that works fine and boots up as long a battery is not connected. I initially thought it was a bad battery so i went ahead and bought a new battery for it and slapped it in yesterday and realize that the same fault exists. When i screw in the battery and connect the little battery strip and i press the power button it will not power on.At that time If i connect the charger i get fan spin for 10 seconds then stops but the machine won't power on.If i disconnect the little battery strip and re-plug the charger the machine boots as normal.It's not the battery connector strip...

Hi everyone,

I'm having an issue with my Lenovo ThinkPad P43s. The laptop does not power on when the internal battery is connected, but it works fine on AC power alone (battery disconnected). Once the battery is reconnected, the system becomes completely unresponsive — no lights, no fan spin, nothing.

Here's what I've tried so far:

• Power/EC reset (held power button for 60 seconds with battery and AC disconnected)
• Booted successfully on AC power only with the battery disconnected
• Visual inspection of the battery — no swelling, burn marks, or connector damage
• Battery

...