CLG04P050L28 Datasheet, PDF (21/26 Pages) List of Unclassifed Manufacturers – Super Capacitors To Improve Power Performance.

EDLC and Battery Coupling
Under drain conditions, a battery undergoes a voltage drop similarly to the
EDLC. Because of many physical and chemical constraints, the
battery often cannot supply the power required while still retaining its
open circuit voltage.
The working voltage of the battery reflects the load on the battery, thus the
larger the voltage drop of the battery the larger the load on the
battery.
Many difficulties are encountered by the designer planning the online
power demand of a system, mainly because the power of the batteries is
limited.
If the battery must supply high power at short pulse widths, the voltage
drop may be too great to supply the power and voltage required by the end
product (cutoff voltage).
The large load on the battery may decrease the useful energy stored in the
battery and even may harm the battery and shorten its work life.
This problem may be resolved by connecting the battery in parallel to an
EDLC (Fig. 5).
Fig. 5
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Revision: 21-3-10
Subject to change without notice