low remote battery at 2.97 V

[lornemalvo]

My wife's skoda came up with a low remote battery warning. I tested the battery (3V) and it came up at 2.97V. Is this classed as low and in need of replacement?

[Bill]

The car thinks so. For the sake of pennies I'd just change it.

[lornemalvo]

Bill said:

The car thinks so. For the sake of pennies I'd just change it.

Yes, already ordered to arrive today. I'm just curious as to what level the voltage has to drop to, to be a problem.

[jeremyc]

It may not be the voltage that the car is measuring; maybe it's the current that the battery is (un)able to provide.

I don't know for sure what the car is detecting, but as has been suggested, it's way easier to simply swap the battery whenever prompted.

[jeremyc]

Assuming it's a CR2032 (or similar)

the internet said:

Good: 3.0V or higher. (A fresh battery will often read between 3.2v and 3.3V).
Marginal/Weak: 2.7V - 2.9V.
Bad: Below 2.7V

[Bill]

jeremyc said:

It may not be the voltage that the car is measuring; maybe it's the current that the battery is (un)able to provide.

I don't know for sure what the car is detecting, but as has been suggested, it's way easier to simply swap the battery whenever prompted.

Yeah, maybe someone will know. I'd guess at signal strength rather than direct measurement.

[Sheepshanks]

The VW Group fobs that use CR2032 are less fussy, but if it's a CR2025 sometimes even brand new batteries don't work, or run down quickly - daughter had a dealer changed one fail after month. They take more current when a button is pushed than the batteries are designed to output.

If you read VW forums everyone has a favourite make - I've found Energiser batteries to last well. Buy them from a reliable source - apparently a lot of button cells sold are counterfeit.

[lornemalvo]

jeremyc said:

Good info, Jeremy, thanks. I should probably have googled it. Thanks all for the responses.