Is A Car Battery Fully Charged When You Buy It. 2-4 ampere is typical for maintenance charging and it will take around 24 hours to fully charge a dead battery at this load. One reason a trickle is always prefered heat is the enemy of bats down side it could take three days to charge a big bat or more.
To boost your battery enough to be able to start the engine it would take around 2-4 hours. As others have said a car alternator or generatordynamo wont easily charge any battery to completely full. The ideal car battery voltage with the engine running is between 137 and 147V.
If your battery is constantly losing its charge that could be an indication that your battery is past its best before.
So the answer to do motorcycle batteries come charged is simply yes. To fully charge a lead acid battery you really need at least three steps. Turn on the charger youll need to read the manual of your chosen charger to find out whether it stops automatically once its fully charged or whether you need to disconnect it manually. Fully charged voltage.
