The lithium battery used in aerial photography is called "lithium polymer battery" (Li-polymer, also known as polymer lithium battery), generally referred to as lithium battery. Lithium polymer battery has many obvious advantages such as high energy density, smaller size, ultra-thinness, light weight, high safety and low cost, and is a new type of battery. In terms of shape, lithium polymer batteries have ultra-thin features, which can be made into batteries of any shape and capacity to meet the needs of various products. The outer packaging is aluminum-plastic packaging, which is different from the metal shell of liquid lithium batteries. The internal quality is hidden. It can be immediately shown by deformation of the outer packaging, such as bulging.

　　There must be six “nos” in the use of batteries. Correct use is the best way to extend battery life.

　　1. Overcharge

　　This is required for chargers. Some chargers have imperfect power-off function after being fully charged, resulting in a single-chip battery that is fully charged to 4.2V and has not stopped charging. In addition, after some chargers have been used for a period of time, it is easy to aging due to components There is a problem of non-stop charging. Therefore, the lithium polymer battery must be supervised when charging. When the charging time is found to be too long, manually check whether the charger is malfunctioning. If there is a malfunction, unplug the battery as soon as possible, otherwise the lithium polymer battery If it is overcharged, it will affect the life of the battery, and it will directly explode and catch fire.

　　In addition, remind everyone that when charging, be sure to charge the battery according to the specified charging C number or a lower C number, and not exceed the specified charging current.

　　2. Don't put it

　　The discharge curve of the battery shows that at the beginning of the discharge, the voltage drops relatively quickly, but when the battery is discharged between 3.9V and 3.7V, the voltage drops not fast. But once it drops to 3.7V, the voltage drop will speed up. Poor control will lead to over-discharge, which can damage the battery in the slightest, and cause a bomber if the voltage is too low. Some model friends will over-discharge every time they fly because they have fewer batteries. Such batteries are very short-lived. The strategy is to fly one minute as little as possible, and one more cycle of life. It is better to buy two more batteries than to fly the battery beyond the capacity limit each time. To make full use of the battery alarm, you should land as soon as possible.

　　3. Dissatisfied with power saving

　　A fully charged battery cannot be stored for more than 3 days at full charge. If it is not discharged for more than a week, some batteries will be swollen, and some batteries may not swell temporarily, but after several full storages, the battery may be directly scrapped. Therefore, the correct way is to charge it after receiving the flight mission. If there is no flight mission within 3 days after the battery is used, please charge the single chip voltage to 3.80~3.90V and save it. If the battery does not fly due to various reasons after being charged, the battery should be discharged to 3.80~3.90V within 3 days after being fully charged. If the battery is not used within three months, continue to store the battery after charging and discharging it once to extend the battery life. The battery should be stored in a cool environment. When storing the battery for a long time, it is best to put it in a sealed bag or a sealed explosion box. The recommended ambient temperature is 10~25°C, and it should be dry and non-corrosive.

　　4. Does not damage the outer skin

　　The outer skin of the battery is an important structure to prevent the battery from exploding and leaking. The damage of the aluminum-plastic outer skin of the lithium polymer battery will directly cause the battery to catch fire or explode. The battery should be handled gently, and the cable tie should be tightened when fixing the battery on the airplane. Because there is a possibility that the battery will be thrown out due to the tightness of the tie when flying in a big dynamic flight or crashing, which will easily cause damage to the battery skin.

　　5. No short circuit

　　This situation often occurs during battery welding wire maintenance and transportation. A short circuit will directly cause the battery to ignite or catch fire and explode. When you find that the battery is disconnected after a period of use and you need to re-wire, pay special attention to the electric soldering iron not to touch the positive and negative electrodes of the battery at the same time. In addition, in the process of transporting batteries, the best way is to put each battery in a self-sealing bag and put it in an explosion-proof box to prevent the positive and negative electrodes of a battery from touching at the same time due to bumps and collisions during transportation. Other conductive materials short-circuit or break the skin and short-circuit.

　　6, do not catch cold

　　This principle is ignored by many flying friends. There are often low temperatures in the north or high altitude areas. At this time, if the battery is left outside for a long time, its discharge performance will be greatly reduced. If you have to fly with the flight time at normal temperature, it will definitely cause problems. At this time, the alarm voltage should be increased (for example, the single-chip alarm voltage is adjusted to 3.8V), because the voltage drop will be very fast in a low temperature environment, and the alarm will immediately drop. In addition, the battery should be kept warm. Before taking off, the battery should be stored in a warm environment, such as in the house, in the car, in the incubator, etc. To quickly install the battery when taking off, and perform the flight mission. When flying at low temperatures, try to shorten the time to half of normal temperature to ensure safe flight.