I recently took my fully working car for a routine service, during the service they did a battery and alternator check.

Within 24 hours of the service my battery light came on, and when I took it back to garage they said the battery and alternator needed replacing.

Is there anything they could have done on service that could have caused this fault, all they did was use a battery tester.

Many Thanks
Thanks Linden,

Battery has been replaced and now has a new battery, but the alternator still needs replacing.

It just seems a little strange that I had no problems with car prior to service, and then after a battery and alternator check, the battery and alternator are damaged.

Is this just unfortunate timing.

Try tighten up the positive and negative cable on the battery to see if that will help if this doesn’t work take your vehicle to auto zone and they will check it for free.