Acer TMP215-41 laptop only works on charger, battery not detected even after reset

Hello, I’m using an Acer laptop (TravelMate P2 TMP215-41 N19Q8). My laptop battery started draining very quickly and then the battery icon disappeared. Now the laptop only turns on when it is plugged in.

I checked the Windows battery report and it says “Battery not detected.” I also tried using the reset pinhole at the back. After that, the battery icon appeared briefly showing 100%, but then it disappeared again. When I unplug the charger, the laptop shuts off immediately.

Can someone please explain why this is happening? Is it caused by a faulty motherboard/power board, or is the battery itself dead?

Thank you!

[Edited the thread to add model name to the title]

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StevenGen

If the battery is not detected in the TravelMate P215-41 OS and the battery has an X mark next to it, then its the laptops EC chip that is not communicating with the battery mainboard and the EC chip needs changing and reprogramming and the bios chip also needs reprogramming also.

This is a very involved job and you need to take your laptop to an experienced technician that can fix this fault and has all the programming tools and firmware for the EC chip and the bios chip, as they both need to be reprogramed. There is no resetting and/or anything that you can do to fix this. Good luck and hope this helps you out.

The EC chip is on the underneath of the mainboard as you open the back cover, as shown below.

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Puraw

Hi Zwone,

At 4½ years old, your battery is already well past the typical 2–4 year service life for lithium‑ion packs. Age‑related wear is by far the most common cause of “Battery not detected” symptoms — especially when the laptop shuts off immediately after unplugging.

EC chip failures do happen, but they’re rare and usually linked to liquid damage, power surges, or a failed firmware flash. Before considering invasive board‑level work like EC/BIOS reprogramming, the simplest and most logical step is to test with a known‑good compatible battery. If the new pack works, the EC is fine. If it doesn’t, then deeper diagnostics make sense.