This information was obtained from the Panasonic Sealed Lead Acid Batteries Technical Handbook, 1998-1999
It applies to most sealed lead acid batteries.
Cycle Life
The cycle life is the number of charge, discharge, or rest cycles a cell or battery can provide.
Cycle life is usually expressed by the number of cycles available before duration
of discharge decreases to a half of the initial value.
Cycle life of the battery is
dependent on the depth of discharge in each cycle.
The deeper the discharge is, the shorter the cycle life
(smaller number of cycles), providing the same
discharge current. The cycle life (number of cycles)
of the battery is also related to such factors as the
type of the battery, charge method, ambient
temperature, and rest period between charge and
discharge. Typical cycle-life characteristics of the
battery by different charge/discharge conditions are
shown by the Figures.
This data is typical and tested at a well-equipped laboratory.
Cycle times are different for each battery model.
Cycle times are also different from this data when
using batteries under real conditions.
Trickle Life
The service life of a battery is in the trickle use. Usually, the trickle life is the
time expressed in years before the dischargeable time of the battery decreases to a
half of the initial value.
Trickle life of the battery is largely dependent on the
temperature condition of the equipment in which the
battery is used, and also related to the type of the
battery, charge voltage and discharge current.
