You are watching: How many watts is a car battery
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Unless you offer the make and model of your battery, it"s not feasible to offer you specifics. However, many of the information should be printed on the label, and you can also generally walk to the battery manufacturer"s net site and look at the actual specs.
Most auto batteries room "12V" (not yes, really exact, and also depending on staying charge and also current draw) yet there are countless systems out there therefore there"s not really a general answer.
Plus also if we pick to speak "12V is a safe bet" because that voltage, the basic capacity, max current, to make reservation capacity, CCA, ability of battery to execute in cold conditions, etc., can vary a lot.
So, you"ll need to go look at up your battery top top the mfr site or check the label. Right here are few of the common stats (as well as definitions take indigenous here):
Cranking Amps (CA) - A rating the is provided to define the battery"s ability to begin an engine in moderate temperature conditions. BCI defines it as "the discharge load in amps that a new, fully-charged battery at 32ºF (0ºC) have the right to continuously provide for 30 secs while keeping a terminal voltage equal to or greater than 1.20 volts every cell." This artificially high rating need to not be confused with CCA, which is conducted at 0ºF (-17.8ºC). Cold-Cranking Amps (CCA) - A rating that is offered to define the battery"s capability to begin an engine under low-temperature conditions. BCI defines it as "the variety of amps a lead-acid battery at 0ºF (-17.8ºC) can supply for 30 seconds and also maintain at the very least 1.2 volts per cell (7.2 volts because that a 12-volt lead-acid battery). Nominal Voltage - The rated voltage of a battery Closed-Circuit Voltage (CCV) - The voltage that a battery as soon as the cell or battery is under a specific discharge load and also time interval. See additionally Open-Circuit Voltage. Reserve volume (RC) - BCI defines it together "the variety of minutes a new, fully-charged battery at 80ºF (27ºC) have the right to be discharged in ~ 25 amps and also maintain a voltage same to or higher than 1.75 volts per cell" (i.e., 10.5 volts because that a 12-volt battery). This rating represents the moment the battery will proceed to operate vital accessories in the event of a charging system failure. Capacity - The capacity of a completely charged battery to provide a specified quantity of electrical power (AH) in ~ a given rate (amps) over a definite duration of time (hours). Rated capacity (Flooded) - The CCA, RC or amp-hours that a battery can provide at a offered rate of discharge, end voltage and temperature. These ratings room often shown on the outside of the battery