Secondary cells are expensive and more complex in usage. •In primary cells, the products slowly migrate away from the electrodes and are consumed by side reactions occurring in the cells. Search Search Only in recent years, the rechargeable cells have reached the density of primary cells, but conventional alkaline batteries produce almost 50% more energy than a comparable Li-Ion secondary cell. [ CC BY-SA 3.0 ], via Wikimedia Commons. Main Difference – Primary vs Secondary Cell. Secondary cells have low energy density and are made of molten salts and wet cells. •Cells that cannot be recharged are called primary cells. Primary cells are cheap and easy to use. These cells continuously charge and supply all kinds of devices, from basic, all known devices to specialized devices and applications. A primary battery cannot be used once the chemicals inside it are exhausted. Primary cells and secondary cells are two types of batteries. A battery can have one or more electrochemical cells and it is composed of terminals that can be connected with external devices which work with a power supply. Secondary cells have a higher self-discharge. The internal resistance is low and the chemical reaction is reversible. Image Courtesy: 1. An example of a primary battery is the dry cell – the household battery that commonly used to power TV remotes, clocks, and other devices. Secondary cell. PRIMARY CELLS •Batteries such as dry cells, alkaline cells and button cells have one common feature; they are non-rechargeable. Scribd is the world's largest social reading and publishing site. Primary and Secondary Cells - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. Batteries are cells which can generate electricity. Secondary cell diagram By Original Author: Barrie Lawson. 2. In such cells, a zinc container acts as the anode and a carbon rod acts as the cathode. Its initial cost is high and is a little complicated to use when compared to the primary cell. ZINC -CARBON DRY CELL “ Alkaline-battery-english ” by Tympanus [Public Domain] via Commons.