Source for the CR2477T batteries

Ruuvi products 🇬🇧 RuuviTag & RuuviTag Pro sensors
1

Would anyone know where I could purchase the CR2477T batteries in Canada or United States?

Regards, Kevin

2

I’ve same question for Germany.

In the shops you have here may CR2477 Types, but no CR2477T. (Use case sauna as an example)

3

CR2477T is a bit hard to find and we cannot ship them internationally because of lithium transport restrictions.

Some specialty shops for batteries or cameras carry them.

4

Thanks, :+1:

I’ll search.

5

As the CR2477 lifetime is so long in Ruuvi tags, I am surprised you are interested in the most likely more expensive and definitely more difficult to fine CR2477T. Especially for use case sauna ( Does everyone in Finland have one?). I would think that a use case where the Ruuvi tag is difficult to access would be the only time it would be of value.

CR2477T 1 gram heavier (13%)

6

Thanks,

good argumentation. :+1:
I’ll check out lifetime of CR2477. :wink:

7

Tech comparison
http://mybeacons.info/battery/CR2477vs2477T.html

revised to add Panasonic

1 Like
8

My understanding is that the cr2477T will perform better under extreme temperatures (-40). The Ruuvi Pro does come standard in their device, and it is rated to -40c. As I live in an extreme temperature area, I would like to find a source for the replacement.

9

Best alternative for CR2477T is Panasonic CR2477 as it has standard range -30…+60C.

1 Like
10

Thank you.

11

Thanks. :+1:

12

Notice that the data sheet for CR2477T shows -20-+60 made by EEMB.
Maybe other vendors have CR2477T with different ranges.

Panasonic datasheeet does say

https://industrial.panasonic.com/ww/products/pt/lithium-batteries/models/CR2477 -30 - 85 !

Of course you could go totally off the chart by taking a 15 year
Panasonic CR-AGZ Cylindrical -40 - +85 and hot wire it in :slight_smile:

13

My research on CR2477T batteries indicates that the ‘T’ stands for ‘Tab(s)’ which are welded/soldered on to the front and back of the CR2477. Being pretty sure that a tabbed CR2477 wouldn’t work inside of a RuuviTag, I focused on the phrase “extended operating temperature range” (from https://ruuvi.com/ruuvitag/#:~:text=extended%20operating%20temperature%20range )

Google’s “AI Overview” (appearing at the top of the search result page) opined, “A standard CR2477 coin cell battery typically operates within a temperature range of -20°C to +60°C (-4°F to 140°F). However, some manufacturers offer versions with extended temperature ranges, such as -40°C to +85°C (-40°F to 185°F). These extended temperature variants are often designated with an “X” suffix, like the Murata CR2477X.”

It referenced the following page discussing Murata batteries: High drain and extended temperature models for lithium coin cell range - \N.

I found the Murata CR2477X at https://www.batteryjunction.com/murata-cr2477-bp1 Battery Junction is currently (as of August 12, 2025) out of stock, but is allowing backorders. I have placed an order.

Alternatively, simply search for “Murata” “CR2477X” (including quotation marks) and you are likely to find it available from other vendors.

14

Hi,

There are different naming for extended range operating temperature but they usually are -T, -HT, or -X. I don’t remember any -T version where there would be tabs.

Renata is selling version -N which is different shape and it doesn’t fit to RuuviTag.

Best alternative batteries are Murata CR2477X or Panasonic CR2477.