Battery Basics
This chapter is devoted to basic problems involved in selecting the right battery for micropower circuits. We start with a summary of battery types.
2.1 Dry Cells
There are three popular cell types based on zinc and carbon: the standard LeClanche dry cell, the “heavy duty” zinc-chloride dry cell, and the alkaline-manganese dry cell. As shown in Table 2–1, there is about a 3-to-1 difference in capacity between the alkaline and LeClanche at a 100-hour discharge rate. The zinc-chloride battery falls about halfway between the other two. Where the most significant differences among the characteristics of these three battery types (or chemistries) occur is in their response to high load currents and in their response to continuous-versus-pulsed ...
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