Night Train
Maker of Things
- Location
- Greater Manchester
Depends on why it was flat to start with.Night Train, once you have got the car (with the flat battery, started) how long do you need to run the engine to recharge the battery?
If the alternator is not charging then the battery will not charge up at all.
However, it is usually the battery that is old and at the end of its life. It will charge up after a few miles of driving but then won't hold that charge.
If it is a 'one off' event like leaving lights on over night with a good battery then the battery will charge quickly but may have been damaged due to being completely discharged. Not always a problem if it still has charge but just not enough to start with.