RECHARGE­ABLE BAT­TER­IES

Gadgets and Gizmos (India) - - KNOW TECH -

Non-recharge­able bat­ter­ies, or pri­mary cells, and recharge­able bat­ter­ies, or sec­ondary cells, pro­duce cur­rent ex­actly the same way: through an elec­tro­chem­i­cal re­ac­tion in­volv­ing an an­ode, cath­ode and elec­trolyte. In a recharge­able bat­tery, how­ever, the re­ac­tion is re­versible. When elec­tri­cal en­ergy from an out­side source is ap­plied to a sec­ondary cell, the neg­a­tive-to-pos­i­tive elec­tron flow that oc­curs dur­ing dis­charge is re­versed, and the cell’s charge is re­stored. The most com­mon recharge­able bat­ter­ies on the mar­ket to­day are lithium-ion (Li-ion).

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