WHAT IS THE DIFFERENCE BETWEEN A PRIMARY AND SECONDARY BATTERY ?
The kind of electrochemical system decides whether the system is a rechargeable one or not. Truly rechargeable systems are reversible systems with regard to electrochemistry and the structure of their electrodes. These reversibilities must not change by the number of charge and discharges (cycles). Since charges and discharges cause a reversible change in electrode volume and structure, the design of a rechargeable battery must be adequate to compensate for these changes. Since a primary battery undergoes just one discharge, its internal construction is in general more simple. No attempt should be made therefore to recharge primary batteries for above reasons. It either is dangerous or uneconomical. If the charging current is too high, unsafe situations may arise, including leakage and even explosions (further information). If a rechargeable system is required, the only sensible choice is to select a truly, genuine, rechargeable system which permits more than 1,000 safe cycles. Batteri
