[Brian Wuttke](https://support.flair.co/hc/en-us/profiles/21562274947-Brian-Wuttke)

- 7 years ago

At what voltage does the battery notification come up for the pucks?

What is an allowable voltage for use?

I am replacing batteries quite often (especially rechargeable ones).

I just removed some batteries and checked the voltage 2.6 volts (according to Flair App). My battery Checker still had the batteries as "good".

### Comments

- Official comment

[Flair Customer Support](https://support.flair.co/hc/en-us/profiles/376392016292-Flair-Customer-Support)

- 5 years ago

Hi Chris,

The battery alert notification will fire when the voltage is <= 2.4V.

See this article for more:

[https://support.flair.co/hc/en-us/articles/360044126272](https://support.flair.co/hc/en-us/articles/360044126272)

All the best,

Finn

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[Chris McIntyre](https://support.flair.co/hc/en-us/profiles/114216532511-Chris-McIntyre)

- 7 years ago

I can’t answer your exact question about the voltage but I think it’s around 3 volts. All of my vents are still running on the original batteries they came with, except for one, that I just had to replace for the first time a month or two ago. It lasted well over a year.

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[Brian Wuttke](https://support.flair.co/hc/en-us/profiles/21562274947-Brian-Wuttke)

- 7 years ago

A couple of my pucks had low batteries so I replaced them all with brand new (fresh out of package) Amazon brand rechargeable batteries. Within 24 hrs all the pucks gave notice of low battery status. There is a chance the batteries aren't the best but i expect some quality from Amazon branded batteries.

Before anyone asks, the Amazon batteries say they ship with full charge.

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[Warren DeLarme](https://support.flair.co/hc/en-us/profiles/366675977512-Warren-DeLarme)

- 7 years ago

Keep in mind that rechargeable batteries are not the full 1.5 volts that alkaline are. Usually 1.3 volts

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[Brian Wuttke](https://support.flair.co/hc/en-us/profiles/21562274947-Brian-Wuttke)

- 7 years ago

@Warren DeLarme.  Good to know.  I had no idea rechargeables were a different voltage

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[Chris McIntyre](https://support.flair.co/hc/en-us/profiles/114216532511-Chris-McIntyre)

- 5 years ago

I’m wondering about battery notifications on vents as well. Just noticed I have a vent that has been offline for more than a week, but there was no notice in the flair app even. This is a situation that would even warrant an e-mail notification in my mind. Replaced the batteries and all is well but looking at the stats I had other vents that were down to 2.8 volts.