It is very long history of batteries, the world’s oldest about 2,000 years ago, battery originated in Baghdad, this is called “the battery, still preserved,” in the Iraqi capital museum (now? Have you ever been blown)? .
Batteries are two commonly used respectively, the parameters of voltage and capacity. Voltage across mainly depends on the material. Generally, the dry are 1.5 V, and rechargeable batteries voltage 1.2 V. How much is the capacity for electricity, with discharge current and discharge time of product. For example 500mAh capacity of the battery, the battery is refers to the discharge current 500mA, can use 1 hour. Obviously, if 250mA with the discharge current, can use 2 hours, and so forth.
The battery is used commonly, alkaline batteries, manganese dry nickel cadmium battery, the battery, the battery laminated button. Manganese zinc dry, nominal voltage 1.5 V, cheap, but continuous discharge, not suitable, and cannot anti-shocking charge, only applies to a small current electronic circuit. Manganese dry a strange characteristics, intermittent discharge time and continuous discharge than time, this is a common trick of dry.
Alkaline batteries, nominal voltage is 1.5 V, its electrolyte is water soluble potassium hydroxide solution, large capacity, can anti-shocking, various aspects are superior properties of manganese dry. In practice, the need to large current circuit, alkaline battery can play a role. Alkaline dry in the use of the tape, heard WALKMAN than common battery life long, the camera in many flash every cell, can use nickel alkaline battery is the best choice. But the alkaline battery price is more expensive.
Most of the alkaline battery chassis, marked “no charge” Chinese or English, but in fact, the alkaline batteries can be recharged, can charge a dozen times. Only on the alkaline battery can take small current charge, using the method of charging current 50mA advisable, and most of the charger charging electric current is larger, the battery in liquid flows, corrosion appliances. LR20 LR6 battery, representing one representative 5 alkaline.
Ordinary manganese, single to dry for the model, the common R v battery R6P is high capacity. Bitbaby like elephants “brand alkaline battery electric equipment.
Many calculators are used in the solar energy, light photocell to button batteries. Solar cells have rectangular flake, also have the round shape transistors. Each piece can produce 0.5 V, more pieces of voltage series, in order to improve the voltage of parallel to increase output current. But generally and button cells in parallel, in the power stored at any time, to small load power supply.
Nickel for every battery is well known, no longer. According to Bitbaby know, small Japan in early 1990s was banned in every cell, nickel production to protect their environment. Now on the market IN love and never dull so much beauty of the battery is nickel isolation which come from? Now, with the help of nimh batteries, and no capacity and environmental protection, and memory effects. Cadmium harmful to human body!