Motorcycle Battery Voltage Chart | Quick State-of-Charge Reference

A 12V lead-acid motorcycle battery at full rest should read 12.6–12.8V, while 13.5–14.5V with the engine running indicates a healthy charging system. Knowing your motorcycle battery’s voltage tells you whether it’s charged, weak, or failing before you get stranded. The numbers depend on battery chemistry—lead-acid and lithium have different resting voltages—and whether the engine is

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