[Gav]

Replace it yourself, doesn’t need anything else.
Don’t use local garage again!

 

[Gav]

Thanks Gav, just worried about cocking up the bms

It’ll sort itself out, but your icarsoft might be able to tell the car it’s got a new s/s battery

 

[Gav]

If you are doing it yourself though please follow the proper procedure, search for it on here if not sure…..

 

[Gav]

Your small battery - which incidentally isn’t the stop/start battery, it’s the big one - is probably duff if your getting around that voltage

the small battery is commonly called the s/s battery as it’s the one that keeps the electrics alive whilst the engine is shutdown but the big battery starts the car.

 

[Gav]

That’s just the vent tube to take away any gases whilst charging, unplug and plug into your new one.
ANY battery remove the negative FIRST reconnect last.