battery ampage

[pass1969]

what is the ampage of a car battery

[748rhydhir]

for example a 48 ampere/hour battery can provide 2amps for 24 hours,12 amps for 4hours or any other combination as long as the time multiplied by the amps flowing comes to 48.
a 72 ampere/hour battery can provide 2amps for 36hours,72amps for 1 hours etc.
hope this helps.

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[Hymie]

748rhydhir�s figures are valid for a fully charged battery, where the battery discharge time is not so short � that the current is limited by the internal battery impedance.

Take a 48Ah battery that can deliver 48A for 1 hour � theoretically it could deliver 2880A for 1 minute. However the battery will have an internal impedance of around 0.04 ohm, which will limit the maximum current flow to around 300A.