Is my Battery knackered ?

Probably.

Assuming that's with the engine stopped, it's showing a partially discharged or faulty battery. You could try an external charge, leave overnight and check the voltage again in the morning. It should be about

Also, to check the charging system, look at the voltage with the engine running. If the battery starts near fully charged, it should read around

However, if it's the original on a T reg, it's lasted well - anything more than 3 years is a bonus.

The message from "Mike Waters" contains these words:

Worth checking the voltage when the engine's running. Should be between

The batteries on micra's do last well it seems, ours is an L reg, had it from new, so i know 150% that it's the origional battery, it spent the first 7 years of it's life being used as a shopping trolley by my mum, did 30k miles in all that time, did need a new clutch at 28k mind :)

since then i've been using it, and she's now on about 70k miles, but still starts on the button on the origional battery.

got a T meself, oem batt. Any hints about replacements?

I decided to get a replacement..starts lovely now..Thanks for your suggestions guys :o)

Mike W.

I'm afraid not. One at a good price with a 3 year warranty would seem as good as any.

There are some 'fancy' makes out there that imply they last longer than standard types, but none put their money where their mouth is with a longer warranty - indeed some makers price the same battery differently according to how long the warranty is...