How Long Do I Have To Charge My Car Battery. A 40 amp charger can charge a 50 discharged small car battery 200-315 CCA or RC 40-60 in about 45 minutes a mid-sized battery 315-550 CCA or RC 60-85 in 1 hour or a large battery 550-1000 CCA or RC 85-190 in 15 hours. When you start your car with a healthy 1265-volt battery your alternator goes to work.
Anyone who expects an alternator to fully recharge a deeply-discharged battery by simply driving around for 10-15 minutes is moving rapidly in the direction of. Normally 4 amps is the common rate for car battery chargers. High speed charging is usually 6-10amps whereas low speed charging is typically 2-3amps which is usual for a gradual overnight charge.
There are many ways of charging a battery plus a myriad of chargers to choose from.
A battery that needs a jump-start whether it needs to be replaced or not is nowhere near a full state of charge. High speed charging is usually 6-10amps whereas low speed charging is typically 2-3amps which is usual for a gradual overnight charge. An old battery is often covered in electrolyte which is very acidic and can. Replacing a car battery as a do-it-yourself project is not very difficult but the battery is heavy 30-45 lb.
