Why you shouldn't use Car Batteries (Flooded Lead Acid Batteries) for an eBike

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A flooded lead acid battery is not recommended for e-bike use for two reasons. First is safety, acid leaks out if battery tilted. Second they are not made to be deeply discharged such as e-bikes do. A car battery is only used to start the car then is charged so DOD (depth of discharge) is only about 10%. e-bike DOD is 50 to 80% DOD. A car battery charger and an alternator charge the battery to only 13.8v max. A car battery is cycled (start car, charge) hundreds of more times than in e-bike applications.
 
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