On Monday, 14 December 2020 at 13:15:42 UTC, AnthonyL wrote:
On Mon, 14 Dec 2020 13:04:50 +0000, R D S wrote:

I happened to have a meter in my hand today so checked it and it's
reading 12.1v which is quite low. Battery life generally being 4-6 years
and us having had the car 4.5 years i'm thinking shall I just replace it?

Probably one cell is shorted, so all the others will be getting overcharged
and the battery will die completely soon (when you most need it).

John