Received the dash 'Key Battery Low' warning - after less than 10 months of fitting a CR2025 (2.5mm thick, 160mAh).

I cannot get a CR2032 (3.2mm thick, 225 mAh) into my key, once in it will not clip under the retainer, wanting to pop out - confused, this is the recommended battery, as it has a longer life.

I am trying to fit a Duracell, so a pucker battery.

A CR 2025 slips in lovely, like they were made for each other.

But I think the key should have the correct battery in it, but I am buggered if I can get it to fit.