How to charge some common batteries to improve battery life?

　　1. Main differences between nickel cadmium battery and nickel hydrogen battery

　　The main difference between nickel cadmium battery and nickel hydrogen battery is that the energy density of nickel hydrogen battery is relatively high. Compared with similar batteries, the capacity of nickel metal hydride battery is twice that of nickel cadmium battery. The main difference between nickel cadmium battery and nickel hydrogen battery is that the energy density of nickel hydrogen battery is relatively high. Compared with batteries of the same model, the capacity of nickel metal hydride batteries is twice that of nickel cadmium batteries, which means that the use of nickel metal hydride batteries can greatly extend the working time of equipment without increasing the additional weight of electrical equipment.

　　2. Advantages of NiMH battery

　　Another advantage of NiMH battery is that a greatly reduces the "memory effect" existing in cadmium battery, so NiMH battery can be used more conveniently. NiMH battery is more environmentally friendly than nickel cadmium battery, because there is no toxic heavy metal element in it. Lithium ion soon became the standard power supply for portable devices.

　　3. Advantages of Li ion battery

　　The advantage of lithium ion battery can provide the same energy as nickel metal hydride battery, but it can reduce the weight by about 35%. It is applicable to electronic devices such as cameras and laptops. Lithium ion has no "memory effect" and does not contain toxic substances, which is also an important factor to make it a standard power supply.

　　At present, there are three kinds of common batteries: nickel cadmium, nickel hydrogen and lithium ion rechargeable batteries. They have been widely used in various portable electrical devices (mobile phones, remote controls, laptops). They have their own characteristics and can be purchased according to their different characteristics!

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