Always loss of Sensor after about 12 days

[ThorstenWSchmidt]

First of all, I love this APP. Ist is so much better than the original one.

I use ist now on my 10th sensor. What is experience is that the sensors are dead after 12 days (give and take 4 hours).

I use Libre 3 EU version. My next sensors are Libre 3 plus, but us still have some regular ones.

With dead I mean that I cannot even find them anymore via NFC through Juggluco or another NFC Tag Scanner. It looks like the SR71SW battery is exhausted. I opened the Sensor and the battery has 0,99V. For silver oxide this equals 5%.

In the left menu -> Sensor I see status 133.
In the main menu I see state 7 (sensor not operational anymore).

Is it possible that the original software puts the sensor sometimes in a sleep mode to save energy? E.g. during night? I would find that frightening.

Or is this a setting in my phone that is causing a higher energy consumption in the sensor? I have a Samsung Galaxy A55.

[j-kaltes]

Not being able to scan via NFC, has absolutely nothing to do with the battery. I have very old (used years ago) Libre 3 sensors that can still be scanned via NFC. From Libre 2 sensors you can easily remove the battery and then you can still scan the sensor (I didn’t manage to do that with a Libre 3 sensor, without demaging the whole sensor).
Also the “stopped working. state=7” error message has nothing to do with the battery. The Patchstatus information is received from the sensor via Bluetooth. For this the battery is needed.

[halprewitt]

After 3 years of experience using Libres, many of them fail to last the full 14 days if they are within the last 30 days of the expiration date. This date is stamped on the outside of the box and the top of the insertion packaging. They also may become inaccurate.

[ThorstenWSchmidt]

Good to know.
My last 10 all had about 5 months to the expiration date. The current one expires in 9 Months. So in 12 days I know more.

Accuracy is no issue. When I wear them for 24+ hours, they are within +/- 10 mg/dL.

[halprewitt]

Amazing dates. In the US, I don't receive any from a pharmacy longer than 3 months. The ones Abbott sends as replacements usually are about 4- 5 months. The accuracy issue shows up within the last 4 weeks of expiration.