IKEA E1743 dead after battery empty & change

Hi,

I have several IKEA E1743 switches and currently the second with this behavior:

The battery in the switch was empty, so I replaced the battery, but the switch seems to be dead. When I press the paring button next to the battery, the LED does not flash and no pairing log is seen in zigbee2mqqt.

As there are now two switches with the same behavior, I wonder if this is a common problem and if there is any trick to revive the switch.

I had an E1744 with same issue. No fix.

Too bad. Do you know what is causing the issue? Should I replace the battery in the switches that are still working before they run out?

Shouldn’t you press it quickly 4 times?

Yes, this is what I mean. I press 4 times and nothing happens.

Verify your battery voltage with a meter.

I have a couple of the E1810 controllers and I’ve noticed that they lose the Zigbee configuration when the battery is changed. It’s a right pain: even though the zigbee2mqtt UI can automatically rename devices in HA.
I haven’t had a problem of not being able to reset them though.

Verify your battery voltage with a meter.

I tried several batteries. Best has 3,33 V.

So they are good. Observe if there is oxidation on battery contacts.
If not, there is not a lot to suggest…

Thank you.

Observe if there is oxidation on battery contacts.

I have already checked them. They are fine.

I managed to get it working again using a different battery. The switch seems to be very particular about batteries. I tried several before…
I had a lot of trouble getting it to connect back to zigbee2mqtt, but after a few tries it worked.

Does that mean you remove them from z2m before pairing them again? In my experience, pairing them again without removing will reuse the existing device.

I doubt it. It just has to be good, fit well and make good contact.