I have a 2017 petrol Octavio which I hadn't used for a couple of weeks and when I tried to start it the battery was flat.

I charged the battery for a few hours and locked the car without starting the engine as I was in a rush.

When I went back and tried to start the engine it wouldn't start and the alarm started going off. There were lots of warning lights on the dash and I couldn't stop the alarm using the key. I ended up having to disconnect the battery to stop the alarm.

I'm guessing there's probably a problem with the battery and that I'll have to replace it.

Do you guys agree or could it be something else?

The current battery is the Banner EFB 6R0 915 105 B which I guess is the original one. If I have to replace it, any recommendations for a reasonably priced alternative?

And will I have to get it "coded" or something before it will work? What does that involved please?

Thanks in advance!

Edited 19 hours ago19 hr by Archie_D
Additional info

18 hours ago, Archie_D said:

The current battery is the Banner EFB 6R0 915 105 B which I guess is the original one.

If it is the original battery then 9 years life on a car with start/stop is pretty amazing.

You SHOULD code a new battery so the Battery Management System knows straight away the capacity and can assume it's fully charged.

Your battery is an 096 EFB 70 Ah. Any reputable brand meeting this spec will be OK. If you change battery spec (to AGM or a different Ah capacity) then it MUST be coded. I have used batteries from VARTA an YUASA, supplied by TAYNA in the UK.

It WILL WORK if fitted without coding but as PetrolDave said it SHOULD be coded in order to ensure correct operation of charging by the cars Battery Management System.

I cannot say whether this is the only problem, but if there are other problems they cannot be dealt with until the battery is performing properly.

If all is well when new battery is fitted you will probably get all sorts of alarm warnings and fault codes but these should clear themselves in just a few minutes when the car is started and driven.