The capacity of a battery decreases considerably with an increase in the discharge rate, which is typically expressed as x/C, where C denotes the battery’s capacity in mAh.
That table tells you two things.
The battery’s capacity is directly proportional to the discharge rate. The 20 hour figures reflect the rated 100Ah capacity, while the 60 minute figures show approximately 60Ah capacity.
The extent of battery discharge directly impacts its capacity. To observe this, you can compare the column figures of endpoint voltages at 1.8v and 1.6v.
You have the option to select the desired endpoint voltage for your application.
The battery’s charge/discharge cycles diminish as it is discharged deeper. You must choose between a high-capacity battery and one that lasts numerous charge/discharge cycles, as you can’t have both.
In case of good fortune, the data sheet of the battery might contain a table or graph depicting the anticipated count of cycles in correlation with the endpoint voltage.
This type of battery is ideal for situations where you typically utilize only half of its capacity, but require an emergency backup that is not frequently used. Although it may reduce the battery’s longevity, it provides a greater capacity when necessary.