Deep cycle battery is a type of battery designed to use the vast majority of these capacities for regular deep discharge. This professional term has long been mainly used for lead-acid batteries with the same shape as automotive batteries; Compared to starter motors or "starting" car batteries, this battery design is suitable for providing only a small portion of capacity to start the vehicle during brief high current bursts.

　　For lead-acid deep cycle batteries, there is a positive proportional relationship between the discharge depth (DOD) of the battery and the number of charging and discharging battery cycles it can perform; The average discharge depth is about 50%, which is recommended as the best choice for storage and cost. The capacity of deep cycle batteries is usually limited by the electrolyte capacity rather than the quality of the electrode, in order to improve the average expected lifespan.

　　The service life of deep cycle batteries

　　The average lifespan of deep cycle batteries is 6 years. But like all other batteries, if deep cycle batteries remain at low discharge levels, they will last for a long time.

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