Depends on the battery. It is listed on the battery as Cold Cranking Amps (CCA).
It takes between 8 and 12 hours to charge a 12 volt battery at 2 amps. The actual time will depending on how much charge is in the battery initially.
modern cars use a 12 volt battery. Amps depends on the battery. Common sizes range from 500-800 cold cranking amps.
Volts * Amps = Watts 12 Volt * 2 amp = 24 Watts
6volts 2amps for 6 volt battery, and 12 volts 6amps for a 12 volt battery. Don't charge a 6 volt battery on the 12 volt setting or it will explode!!!!!!!!! you're ok going the other way though.
8 hours
A 10 amp charge will only output 10 amps and 12 volts. So, if you want to charge thee 12 volt batteries hooked in series you will have to disconnect the positive cable from each battery and charge then individually. You cannot charge three 12 volt batteries hooked in series. That requires a 36 volt charger.
60 amps
55/12=4.6
A 12 volt automotive battery has six cells.
The power output of a 12-volt battery producing 2.7 amps can be calculated using the formula: Power (watts) = Voltage (volts) x Current (amps). So, in this case, the power output would be 12 volts x 2.7 amps = 32.4 watts.
They don't. Car batteries produce 100's of amps of current. a 1.5Volt flash light battery produces milli-amps at best.
With a 12 volt battery charger set to around 5 amps. Do not overcharge if it is not an automatic charger.