Let’s say your laptop stopped running on the battery power. It works fine from the AC adapter but shuts down as soon as you unplug the adapter. If that’s the case, try reconnecting the main battery. Remove it from the laptop and install back. It’s possible the battery is not making good connection with the motherboard.

Unfortunately, the only reliable way to test the main battery is replacing it with another known good battery.

If the laptop cannot detect the battery, even though it’s installed, try replacing the battery with a new one. If you still have the same issue, most likely there is a problem with the system board.

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