08-01-2015, 12:42 PM
A long time ago an old car of mine had a completely knackered battery, on cold mornings it could barely work the radio or sidelights, turn the key and you would lucky to hear the solenoid trying to move, however I had a 12V 30A power supply which I used to connect up in the mornings and after only about 20 seconds of charging it would have somehow 'woken the battery up' as it would then crank the engine as if it were a brand new battery, I don't know what it actually did to the battery but it worked.
John
John
