Difference between alkaline zinc manganese dioxide battery and ordinary zinc manganese dioxide battery

　　In the eyes of ordinary people, batteries are divided into alkaline and ordinary zinc manganese batteries. In the past, people often felt that the service life of the battery was not as ideal as they imagined in daily use, which is the difference between alkaline zinc manganese dioxide battery and ordinary zinc manganese dioxide battery. In daily use, electrical appliances with large flow such as BP machines, flash lamps, cameras and electric toys can best show the characteristics of alkaline batteries and ordinary zinc manganese batteries.

　　The alkaline zinc manganese battery has been used for 144 flashes, 8 rolls of camera film and 183 minutes of toys. These indexes are 6.86, 4.38 and 3.81 times better than those of ordinary zinc manganese batteries in use in the same period, and the performance price ratio is 4.34, 2.78 and 2.41 times better. For consumers, alkaline zinc manganese battery can be used with reasonable confidence.

　　Ni Mn Rechargeable Battery: This is the latest battery variety - alkaline nickel manganese high current battery (NiOH MnO2) published in March 2002. Due to the large power consumption of digital cameras, the current of ordinary alkaline batteries cannot be driven before the power is completely used up, resulting in waste. The new generation of nickel manganese battery adopts the "nickel hydroxide NiOH" which is normally only added to the nickel hydrogen battery in the positive material of the battery, and successfully develops a new type of battery whose power is not easy to decline with the use of time. This kind of battery not only has a large current, but also its endurance is 1.5~5 times higher than that of ordinary alkaline batteries.

　　Ni Cd Rechargeable Battery: Ni Cd battery is the earliest battery type used in mobile phones, laptops and other devices. It has good high current discharge characteristics, strong overcharge and discharge resistance, and simple maintenance. The most fatal disadvantage of nickel cadmium battery is that if it is not handled properly during charging and discharging, it will cause serious "memory effect", which will greatly shorten the service life. The so-called "memory effect" means that the battery is not fully discharged before charging, which will lead to the reduction of the battery capacity over time. During the charging and discharging process of the battery (discharge is more obvious), a few small bubbles will be generated on the battery plate. Over time, these bubbles reduce the area of the battery plate and also indirectly affect the battery capacity. Of course, we can reduce the "memory effect" by mastering reasonable charging and discharging methods. In addition, cadmium is toxic, so nickel cadmium battery is not conducive to the protection of the ecological environment. Many shortcomings have made nickel cadmium batteries have been basically eliminated from the application range of digital equipment batteries.

　　The packaging of nickel cadmium battery can be divided into two types: positive pole convex head for retail use and positive pole flat head for assembly, and there is no difference in capacity. The charging circuit is similar to the NiMH battery described below, which uses 1.6 times the voltage for charging. Normally, the charge times of nickel cadmium battery are 300~800 times, and the capacitance will drop to about 80% after 500 times of charging and discharging. The memory effect of nickel cadmium battery is more serious than that of nickel hydrogen battery. Therefore, charging can only be carried out when there is no power to ensure the service life.

　　Ni MHRechargeable Battery: Ni MH battery (Figure 4) is a substitute for the early nickel cadmium battery. It no longer uses toxic cadmium, which can eliminate the pollution caused by heavy metal elements to the environment. It uses nickel oxide as anode and metal alloy absorbing hydrogen as cathode. Because this alloy can absorb hydrogen up to 100 times of its own volume, its storage capacity is extremely strong. The energy density of Ni MH battery is higher than that of Ni Cd battery, and its capacity is several times of that of Ni Cd battery; In addition, it has the same 1.2 V voltage as the nickel cadmium battery and its own discharge characteristics. It can be recharged within one hour, with low internal resistance. Generally, it can conduct more than 500 charge discharge cycles. NiMH battery has a large energy density ratio, which means that it can effectively prolong the working time of the digital equipment without adding additional weight to the digital equipment. At the same time, the nickel metal hydride battery is basically similar to the nickel cadmium battery in terms of electrical characteristics. It can completely replace the nickel cadmium battery in practical application without any modification of the equipment. Another advantage of NiMH battery is that it greatly reduces the "memory effect" existing in NiCd battery, which makes NiMH battery more convenient to use.

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