How Long To Charge Car Battery At 2 Amps. While a 2-amp charger is certainly safe for your vehicles battery it can take up to three days to fully charge your vehicles battery depending on how depleted it is and the size of the battery itself. Use a charge that has a trickle charge mode and follow the instructions for that charger precisely so that your battery will last a long time and have.

There are some real drawbacks to having a 40 amp car charger. This type of amperage is used when using a trickle charger or just maintaining your. That means in one hour the battery will receive a charge of 2 amperes and in 10 hours it will receive a charge of 20 amperes and so on.
I have a 20 amp dual bank charger for two batteries with a.
Aside from jump starting the fastest but not always the most efficient method you can also consider using a reliable car battery charger. Going down this route a car battery takes 24 hours to be fully charged at 48 amperes. I have a 20 amp dual bank charger for two batteries with a. That means that the charger will increase your battery power by about 2 amps for each hour that it is connected.
