STOP battery low??

Hi anyone no what this could do be? Been coming on off for about a week so bought a new battery today but when I stopped to put fuel in its popped back up.

It only comes on for few seconds then goes off, is this a common thing with these?
 
If the problem persisted after changing the battery maybe your alternator isn't charging properly?

Wouldn't know how you'd diagnose this though, just a thought.

If it only appears for a few seconds though before going it might just be because of the cold weather.
 
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Car drives fine pal so it is weird. I thought it might have been battery in fob? Could it it be that.

I'll get it on s multi meter tomorrow at work.
 
Oh when you said you replaced battery did you mean the car battery or the fob battery?
 
Yes the car battery but it makes sense now about the fob battery so I've replaced that to.

Anybody on here used efi tuning for mapping before? I no he has a 200rs him self.