What Amp Setting To Charge Car Battery. Disconnect the cables and now your battery is ready to use. A 10 amp charger can charge a 50 discharged small car battery 200-315 CCA or RC 40-60 in about 2 to 3 hours a mid-sized battery 315-550 CCA or RC 60-85 in 3 to 4 hours or a large car battery 550-1000 CCA or RC 85-190 in 4 to 7 hours.
Check the battery charger display to see when your battery is fully charged. Many battery chargers deliver two to six amps some allow you to choose the amperage level and will take at least several hours to recharge a dead car battery. Charging any faster could hurt the battery and we only recommend smart chargers for charging.
This is the best way to understand how to operate your marine battery charger.
On the 12 amp charging setting the needle will settle at around 6 amps or just under. Double these times if the battery is fully discharged. So if you end up with a 100AH rated battery you can use a 25 Amp Charger. 2-4 ampere is typical for maintenance charging and it will take around 24 hours to fully charge a dead battery at this load.
