Power-Sonic Sealed Lead Acid Batteries - Technical Manual - Manual (Page 15)

POWER-SONIC Rechargeable Batteries
Charging
Charging Characteristics
During constant voltage or taper charging, the battery’s current acceptance decreases as voltage and state of charge
increase. The battery is fully charged once the current stabilizes at a low level for a few hours. There are two criteria for
determining when a battery is fully charged: (1) the final current level and (2) the peak charging voltage while this current
flows.
Charging Methods
Selecting the appropriate charging method depends on the intended use (cyclic or float service), economic
considerations, recharge time, anticipated frequency and depth of discharge, and expected service life. The key goal of
any charging method is to control the charge current at the end of the charge.
Figure : Typical charge characteristics for cycle service where
charging is non-continuous and peak voltage can be higher.
Figure : Typical characteristics for standby service type charge. Here,
charging is continuous and the peak charge voltage must be lower.