Car dead

[Fpt]

Hi all , quick question 2011 xf  is the car.tried to start it but it was dead, so took the battery of and chargers it up. I don’t think the battery was dead , but put a charge in it. The car fired right up, but the sat nav and radio didn’t work for a while . The dash kept putting messages up. So is this just because the battery was taken off?, or is there an electrical fault?

 Thanks 

[Jimbov8]

How long did you charge the battery for? At rest, engine off a fully charged battery should read 12.8v. These cars do not like low voltages as strange things start to happen.

[Fpt]

Hi Jim 

its the father in laws car, so from what I can gather he was out for the day when it wouldn’t start so he charged the battery. Since then the electrics have played up ,satnav,radio,a/c,. I’m having a look at it today.

 Thanks for the reply