The 14500 lithium battery is a lithium battery with a diameter of 14mm and a height of 50mm. It is divided into a lithium iron phosphate battery and a lithium cobalt acid battery according to the core material. Lithium cobalt acid battery voltage 3.7 V, lithium iron phosphate battery voltage 3.2 V.
Since its exterior size is the same as that of the AA5 # battery, a 14500 lithium battery and a seat bucket can be used instead of two AA batteries. Compared with nickel-metal hydride charging batteries, lithium batteries have the advantages of light weight, low self-discharge, and superior discharge performance. Therefore, they are widely used by photography enthusiasts in digital cameras and electronic cigarettes instead of nickel-metal hydride charging batteries. What's the endurance? It should be okay, depending on what you're using and how often, how strong, and how long you're using it, with a nominal capacity of 1600mAh.
1. 14500 Purchase Problem
Since the voltage of the lithium battery is (2.5 V -- 3.7 V) over discharge or overcharge will damage the battery, the battery with a protective plate can be protected. I do not think that because the 14500 battery with a protective plate is a few MM higher than the ordinary No. 5 pool, some camera lids cannot be covered, and the battery contacts that can be covered and can be used by the camera have an impact. The longer the time, the longer the elasticity will decrease. Will cause poor contact. Another protective panel cannot play the battery's maximum energy efficiency because the protective circuit is in 2. 5V automatically power off, the camera will suddenly power off, will not automatically shut down, may cause losses to the camera
2. 14500 Over Release Problem
Some details on the minimum voltage total problem without a protective plate should be noted:
The voltage range of the camera, typically from 2.4 V to 4.2 V
Therefore, the camera will often be turned off when the voltage is up to 2.4 V. The camera has selected a choice of battery type (alkaline, nickel battery, lithium battery). Choosing different battery type shutdown voltage is not the same, as long as the lithium battery is selected. The shutdown voltage is 2.6 V. Batteries without protective panels have a safe voltage of 2.5 V, so there is no overdischarge problem, and they can also maximize battery energy efficiency. (determined by your camera)
3. 14500 Overcharge Problem
When the lithium battery core is overcharged to a voltage higher than 4.2 V, side effects begin to occur. The higher the overcharge voltage, the higher the risk is. After the lithium core voltage is higher than 4.2 V, the number of lithium atoms remaining in the cathode material is less than half. At this time, the cell often collapses, causing the battery capacity to permanently drop. If you continue to charge, since the negative cell is full of lithium atoms, the subsequent lithium metal will accumulate on the surface of the negative electrode material. These lithium atoms grow dendritic crystals from the negative surface to the direction of lithium ions. These lithium metal crystals pass through the diaphragm paper and short-circuit the positive and negative poles. Sometimes the battery explodes before the short circuit occurs. This is because, during the overcharging process, the electrolyte and other materials will crack to produce gas, causing the battery shell or pressure valve to swell and burst, allowing oxygen to enter the lithium atom that accumulates on the negative surface. Reaction, and the explosion.
Therefore, when charging a lithium battery, it is necessary to set a voltage limit so that the battery's life, capacity, and safety can be taken into account at the same time. The ideal charging voltage limit is 4.2 V. Lithium core discharge should also have a lower voltage limit. When the core voltage is lower than 2.4 V, some materials will begin to be destroyed. And because the battery will discharge itself, the longer the discharge, the lower the voltage will be. Therefore, it is best not to stop at 2.4 V when discharging. During the period from 3.0 V discharge to 2.4 V of the lithium battery, the energy released only accounts for about 3 % of the battery capacity. Therefore, 3.0 V is an ideal discharge cut-off voltage. When charging and discharging, in addition to the voltage limit, the current limit is also necessary. When the current is too large, lithium ions do not have time to enter the cell and will gather on the surface of the material.
The page contains the contents of the machine translation.
The range of 14500 batteries capacity is 600-1000 mAh, which belongs to green new energy, environmental friendly and has no pollution, no memory effect, so it is favored by the customers. The product has high energy density, small self-discharge, long service life and it can reach more than 500 cycles, and internal resistance is within 100 m Ω. It is widely used in portable devices, home appliance, military equipment, telephone switches, electrical equipment and electrical instrumentation field.
Product number: 18BQ31DQ068-01
Battery specification: 14500-1S1P/3.7V/800mAh
Working voltage: 2.4~4.2V
Standard discharge continuous current: 0.2C
Maximum discharge continuous current: 0.5C
14500 lithium battery is not as common as 18650. It is special-shaped battery, generally for the corresponding customer shipment, so it is not common. The best 14500 lithium battery brands are Samsung, Duracell, Sanyo, Saft, Nitecore, Efest, Ultrafire, etc.
Selected A-class excellent lithium ion battery has high capacity, low internal resistance, large discharge current, no memory effect, and can be charged and discharged at any time.
It has stable performance and long cycle life. After continuous charging and discharging for 500 times, the battery capacity shall be no less than 86% of the rated capacity.
It has original solution and high intelligent protection circuit design to prevent the battery from over-charging, over-discharging, overheating, short circuit, explosion and other phenomenon of damage.
It does not contain mercury, aluminum, cadmium and other harmful substances. It meets the environmental protection requirements of European and American markets.
It conforms to UN38.3, ROHS, MSDS, CE and other certifications.
14500 lithium batteries are batteries that have 14mm in diameter and 50mm in height. The cell material is divided into lithium iron phosphate battery and lithium cobalt oxide battery. The voltage of 14500 lithium cobalt oxide battery is 3.7V, while the voltage of 14500 lithium iron phosphate battery is 3.2V.
The size of AA battery is the same as that of the 14500 battery, but it is generally a disposable battery or NIMH and NICD rechargeable battery. There are four kinds of AA batteries on the market: LR16 AA alkaline battery, R5P AA carbon battery, AA NI-MH battery and AA NI-CD battery. We can learn the basic performance of AA battery through the letters on the battery logo, so as to decide what kind of battery to use on what device.
The difference between 14500 battery and AA battery
There is no difference in appearance, except that one 14500 are similar to two AA batteries.
Different voltage: the voltage of 14500 lithium battery is generally about 3.2-4.2 V, and the most common is 3.7V. AA battery has a voltage of 1.5V (non-rechargeable) or 1.2V (rechargeable).
The working principle (internal chemical reaction process) is different.
14500 is a rechargeable battery. Most ordinary AA batteries are disposable batteries, and can be charged rarely or cannot be charged.
14500 battery can be charged. It has better duration than AA battery.
14500 battery is 3.7V and AA battery is 1.5V
Is AA battery and 14500 lithium battery universal?
There are two types of 14500 lithium batteries: 3.2V lithium iron phosphate and 3.7V ordinary lithium batteries.
Whether it works or not depends on whether your appliance uses one AA battery or two.
If it is an electrical appliances using one battery, it cannot be replaced with 14500 lithium battery under any circumstances.
In the case of a two-battery appliance, a 3.2V 14500 lithium iron phosphate battery can be universal when equipped with a placeholder (dummy battery). A 3.7V 14500 lithium battery might be universal, but not the best match.
Cylindrical lithium ion battery cell provisions:
It tends to be showed in five digits. The first two digits refer to the diameter of the battery and the last three digits to the height.
14500 battery has 14mm in diameter and 50mm in length.
18650 battery has a diameter of 18mm and a length of 65mm.
The capacity of them is also different. The capacity of 18650 is much larger, generally above 2000mAh. Some with high quality is over 2600mAh, while the capacity of 14500 battery is generally below 800mAh.
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