TS0203 door sensors report 2500mV and 1% battery even with brand new battery

[obones]

Hello,

I have quite a few TS0203 door sensors around the house, and for some reason that I don't understand they report that their battery voltage is at 2500mV and level is at 1% despite putting a brand new battery 10 days ago. And I measured the battery again, the multimeter says 3V
Here is the state of things:

2 AAA powered -> OK
1 CR2032 powered -> OK
4 CR2032 powered -> 1%

All CR2032 sensors received a new battery 10 days ago

Is that an issue with zigbee2mqtt (I doubt it) or a malfunction in the device themselves?

[danielszilagyi]

I have similar issue with maybe only one batch of the same looking cheap window sensors.

The devices report 1% with brand new battery, but battery_low is false.

device_class: window
friendly_name: Nappali_WindowSensor_Right Door
battery: 1
battery_low: false
contact: true
device:
  applicationVersion: 67
  dateCode: ""
  friendlyName: Nappali_WindowSensor_Right
  hardwareVersion: 1
  ieeeAddr: "0xa4c1380d9a59bea6"
  manufacturerID: 4417
  manufacturerName: _TZ3000_mq9f17dw
  model: TS0203
  networkAddress: 48256
  powerSource: Battery
  stackVersion: 0
  type: EndDevice
  zclVersion: 3
last_seen: "2024-01-14T16:50:08+01:00"
linkquality: 207
tamper: false
voltage: 2500

[dsduarte]

I have the same issue... one of a few TS0203 that I have installed on the house keeps reporting 8% battery level...
A few days ago I replaced battery for 5 TS0203 and this one keeps reporting 8% while the other 4 devices are now 100%.
I tried remove/repair, remove/restart/repair and its the same... I even tried to remove the battery from other device that successefully updeted to 100% and test it on this device and the result is the same.

[Habile2019]

Same for me, for all but one. I don't believe I saw this with ZHA. I did notice the battery contacts on these are pretty poor and do notice the led flickering when enabling pairing - no idea if that is having any impact.

[rodrigolinkweb]

any solution?

[AndKe]

Same here - I see "battery low = false, voltage 2500mV, which is wrong, the battery is 2944mV , and this 1% did not change even weeks after the battery have been replaced. (it says up to 24hrs.)

FWIW: it seems that the battery voltage is reported in 100mV intervals, another one I have, with 3050mV or so, is reporting 2800mV. (so it's always about the nearest 100mV)

[deviantintegral]

I noticed the same, and confirmed the voltage reading is what is being sent "on the wire" by the door sensors. I've filed a PR to use the same voltage mappings as ZHA. It may not be better (we'll need to see what the last recorded voltage is before batteries are fully dead), but at least new batteries won't show up as 1%:

Koenkk/zigbee-herdsman-converters#7681

Also, it appears battery alarms aren't supported by at least three different door sensor models. This was just fixed and should be out in the next zigbee2mqtt release.

If you have models that aren't yet in this list, and are thinking the battery low value is not right, the best course of action is to sniff your network with Wireshark for >24 hours and confirm that no battery alarm attribute updates are sent.

Koenkk/zigbee-herdsman-converters#7677

[GrumpyMeow]

My single device (TS0203, _TZ3000_6zvw8ham) reports as state:

{
    "battery": 9,
    "battery_low": false,
    "contact": true,
    "linkquality": 58,
    "tamper": false,
    "voltage": 2500
}