Hi.....have replaced battery in key fob & now it does not work!....any clues gratefully received (this is all a Bit new to me)

Use only Duracell CR2032 and don’t buy off EBay or Amazon.

Preferably from a reputable (big box) store like Home Depot, Lowe’s etc…

The contacts inside the key fob are quite fragile, make sure they are not damaged after your replacement battery fit, and in good contact with the battery faces.

N6 JMX

many thanks....will check

The other thing to ensure is that you are using a reputable, e.g. Duracell / Energizer / etc. key fob battery which has not been purchased from the internet, but a local supermarket or similar. It is not unknown that internet providers are selling defective batteries.

You already purchased the battery, but for reference it should be a CR 2032

N6 JMX

Thanks...have now fixed with another new battery & slightly bending contacts to align.