Paul Estrich's List: car

When you get the new battery once a month throw the charger on the car using the front jump terminals. In 2 amp mode in 5 minutes it will charge the battery to max. Its very very good for the battery as the car cannot put a full 100% charge on the battery and more importantly it will tell you real quick how healthy the battery is by how long it takes to complete a full charge. A full charge is when the current meter goes to 0. Alot of us do that routinely with our Prius's.
 A healthy battery will charge to full real quick. A sick battery like the one you have will never complete a charge no matter how long it stays on the charger. It will always show current draw no matter how long the charger is on it.