Oops, there she was all, the battery for the remote control of our heater and of course it was winter. At our dealership, I learned that even there, the battery with a delivery time of about 3 weeks for only 20 - could be ordered. So hastily looked at amazon, ordered for significantly less than 10, - and installed after 1 week. Fits and works flawlessly. Really great, faster and cheaper; I want more ?!