Classification of battery

There are three types-primary batteries, secondary batteries and reserve batteries. Battery should have the features like long shelf life, recharging capacity, portability, compactness with less weight and economical. Primary batteries are working on the principle of conversion of the free energy change of the active materials during electrode processes into the electrical energy. Primary batteries cannot be recharged and it generates electrical energy till the active materials present in the battery. Thus in this case cell reaction is irreversible. Examples for primary battery are dry cells.  Secondary batteries are also known as rechargeable batteries or galvanic batteries. By passing an electric current through the cell in a direction opposite to that of the discharge, restoration of charge in secondary batteries can be done. Here cell reactions are reversible. Lead-acid battery, Ni-Cd battery etc. are examples. In reserve batteries, a part is detached from the rest of the battery before its activation. This helps to enhance long term storage capacity. Lithium vanadium pentoxide cells are examples.

Addressable analog detector

Some of the analog systems can be converted into an intelligent system with virtually unlimited possibilities and applications when they are combined with a modest microprocessor. Addressable analog detector is a classic example of analog devices in this category. We can use a manual addressable analog detector here. There exists some more variety of addressable analog detectors where any one of the following physical principles involved-ionization effect, photo electric effect, flame effect and thermal effect. The detectors are working as sensors and do not generally initiate alarm. The control panel which includes a microprocessor analyzes the digital information received from addressable analog detectors and kicks off the alarm signal.