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A battery charger, recharger, or simply charger, [1] [2] is a device that stores energy in an electric battery by running current through it. The charging protocol—how much voltage and current, for how long and what to do when charging is complete—depends on the size and type of the battery being charged.
Trickle charging is the process of charging a fully charged battery at a rate equal to its self-discharge rate, enabling the battery to remain at its fully charged level. This state occurs almost exclusively when the battery is not loaded, as trickle charging will not keep a battery charged if current is being drawn by a load.
Nikon released a firmware update Ver. 1.01 for the D5200 on 14 November 2013. [10] The update added support for EN-EL14a Rechargeable Li-ion Battery in the D5200. Another firmware update Ver. 1.02 was released on 21 January 2014 [11] adding support for retractable lenses and providing bug fixes.