Yesterday I changed my rear wheel bearings and had to charge my phone via the cigarette lighter (which is a bit faulty as you have to niggle it around for it to charge)
I only charged it for around 30-40 minutes and when I finished the job the car wouldn't start so I jumped it and all was good, got up this morning and it was dead so I had to jump the car once again. I put the meter on the battery and it was reading about 14.1v.
Does this mean my alternator is fine? Is my battery knackered? If my battery is knackered how come a 30 minute charge would do that? (Engine wasn't running). I have never had any problems with the battery before this.
Any insight would be great