1. In terms of weight

　　In terms of the voltage of each unit battery, nickel -metal hydride and nickel -cadmium are 1.2V, while the lithium battery is indeed 3.6V, and the voltage of the lithium battery is 3 times that of the other two. And the weight lithium battery of the same type of battery is almost equal to the nickel -cadmium battery, while the nickel -hydride battery is heavier. It can be seen that each battery itself is different, but due to the high voltage of the 3.6V of the lithium battery, the number of single battery combinations at the same voltage of the same voltage can be reduced by 3 minutes to reduce the weight and volume of the formation after the molding.

　　2. Memory effect

　　Nickel -hydride batteries have the same memory effect as nickel -cadmium batteries. Therefore, regular discharge management is also necessary. This regular discharge management is processed in a fuzzy state, and even some discharge under incorrect knowledge (differently after discharge or use of discharge is different due to the difference in the company) It is unavoidable when using nickel -metal hydride batteries. Relative lithium batteries are very convenient and simple in use because there is no memory effect at all. It does not need to ignore the amount of residual voltage at all, which can be charged directly, and the charging time can naturally be shortened.

　　3. Self -discharge rate

　　Nickel -cadmium batteries are 15-30%(month). Nickel -hydride batteries are 25 ~ 35%(month), and lithium batteries are 2 ~ 5%(month). The self -discharge rate of the above nickel -metal hydride battery is the largest, while the specialty of lithium batteries is extremely low compared to the other two types of batteries.

　　Fourth, charging method

　　Nickel -hydride batteries and lithium batteries cannot be tolerated. Therefore, nickel -metalized batteries use the PICK CUT control method with a fixed -current charging. When the charging voltage reaches the highest, stop continuing charging as the best charging method. The lithium battery is best charged using a fixed current and fixed voltage. If a DV control method of the nickel -cadmium battery is charged, the nickel -metalized battery and lithium battery are charged.

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