In this method, battery is charged with a constant current until voltage reaches the end-of-charge(EOC) voltage. Thereafter, charger switches to a constant voltage charging, where the charging current falls with time. The battery is said to be charged when the charging current drops to a predetermined limit. This is the preferred mode for charging Li-ion batteries.

== Battery Discharging ==

=== Comparison between the batteries ===

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|'''System'''

The surfaces of battery terminals that extend inside the battery case need to be insulated with potting materials to prevent unintentional contact with other conductors inside the case and also to prevent bridging by electrolyte leaks. Wires inside the battery case should be insulated, restrained from contact with cell terminals, protected against chafing and physically constrained from movement due to vibration or bumping.<ref name = "nasa"/>

Certification of the crimp is critical for ensuring that individual cells will not leak after launching.<ref name = "nasa2"/> Cell terminals need to be protected from contact with other conductive surfaces. <br \>

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==References==