Panasonic BR1225 vs BR1225A

Panasonic makes two versions of the BR-1225 Coin Cell battery with different operating temperatures.

BR-1225 Operating Temp -30℃ to + 85℃
BR-1225A - High Temperature -40 ℃ to + 125℃

Resources -

BR1225_DataSheet (panasonic.com)
BR1225A_DataSheet (panasonic.com)