Upload time:2020-12-30| Author:admin
The strong light flashlight is suitable for field operations, mines, railways, power maintenance and other working environments. In the foreseeable future, it will also have more applications. The important parameter of the strong light flashlight performance is the brightness, which is reflected in the range of the bulb. Determined by the current and voltage of the battery. Therefore, for a strong light flashlight, a matching lithium battery is very important.
The following is a description with a 16340 battery used in a 7.2V, 0.85A bulb.
There are many types of lithium batteries used as the light source of strong flashlights. The commonly used ones are 18650, 17670, 16340, etc. First of all, we must understand the meaning of these models. The first two digits of the battery model indicate the battery diameter, and the back three digits Indicates height. Take the 18650 lithium battery, which is the most mature in the market, with a diameter of 18mm and a height of 65mm. The 16340 battery used in a flashlight refers to a lithium battery with a diameter of 16mm and a height of 34mm.
A flashlight bulb with a given voltage and discharge current requires that the lithium battery cannot be overcurrent, let alone overvoltage.
For a 0.85A bulb, the best discharge current is 0.85A. If the current is too small, the flashlight may not have enough brightness. If the current is too large, the battery structure may be damaged due to overcurrent. Therefore, "matching" is the best. It can achieve maximum brightness without damaging the battery. For example, when powering a 0.85A light bulb, the current of the Youlai 16340 lithium battery will not work, and it may suddenly become dark after a few minutes of light. If the Thunderhawk 16340 lithium battery with larger current discharge performance is used, the discharge effect will be better. Much better.
7.2V bulbs should be powered by two lithium batteries in series, because the rated voltage of lithium batteries is 3.6V~3.7V, and two 3.6V batteries in series are 7.2V. On the other hand, if the voltage of lithium batteries in series is higher than that of the bulb If the voltage is too much, this is the over-pressure operation, which will cause the bulb to burn. Therefore, the flashlight that used Ni-MH batteries before, if you change to the lithium battery, you must change the bulb. Over-pressure operation can make the flashlight measure higher, but it is negative The effect is that the light bulb may be burnt, and the gain is not worth the loss, so you must use a bulb above 6V when choosing a flashlight.
Finally, it is the charging of the flashlight lithium battery. The lithium battery charger judges whether the battery is fully charged according to the voltage value. The termination voltage of a single lithium battery is 4.2V. As long as you buy an authentic charger, the charger will automatically Charge to 4.2V, and then stop charging. It is emphasized here that the authenticity of the charger is very important.
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