Flashlight battery 1AA (v. 1 No. 5 batteries), 2AA (2 batteries of 5), 3AA (3 5 batteries), 5 batteries and alkaline batteries is usually said can not charge the dry battery (4.5V) and can charge the nickel metal hydride battery (1.2V)
还有就是锂电池了,电压2.45-4.20V,型号有14500、16340、18650等等,很多朋友看这些数字有些晕,说怎么区分啊,其实很简单,定型号的数字都是有原因的,比如14500电池的直径是14毫米,长度是50毫米;16340电池直径是16毫米,长度是34毫米,以此类推,18650电池就是直径18毫米,长度65毫米。哈,明白了吧。
There is a lithium battery, voltage 2.45-4.20V, type 14500, 16340, 18650 and so on, these figures some faint many friends, that how to distinguish ah, actually very simple, specific model numbers are reasons, such as the 14500 cell diameter 14 mm, length is 50 mm; 16340 cell diameter is 16 mm, length is 34 mm, and so on, the 18650 battery is diameter 18 mm, length 65 mm. Ha, see.
电池可以直驱(就是直接将电池的两端用导线链接到LED的正负接头上)大部分LED的,但是电流不稳定,有大有小,容易造成LED寿命缩短产生光衰,所以控制电压和电流的手电筒专用电路就诞生了。
The battery can be direct drive (that is, directly to the battery positive and negative joint in the two ends of the wire links to LED on most LED), but the current instability, large and small, easy to cause the LED to shorten the life span of the light, flashlight dedicated circuit so that the control voltage and current was born.
1、升压电路。主要用于使用1AA、2AA电池的手电,因为大部分LED的工作电压在3.6左右,AA电池电压在1.2-1.5,电压不够,需要将电压升到3.6才能使LED正常工作,也就产生了这种电路。
1, boost circuit. Mainly used for 1AA, 2AA battery flashlight, because most of the working voltage of LED 3.6, AA battery voltage 1.2-1.5, the voltage is not enough, need the voltage to rise to 3.6 in order to make the LED work, also produced the circuit.
2、降压电路。一般用在双锂电手电筒上的,比如用2节16340的手电筒,LED的工作电压在3.6,而2节16340串联的电压有7.5V左右,就需要把电路的输出电压降到3.6为LED供电。
2, the step-down circuit. Generally used in the double lithium flashlight on, such as the use of 2 16340 flashlight, LED operation in 3.6, 2 and 16340 series voltage is about 7.5V, you need to put the circuit output voltages down to 3.6 LED power supply.
3、自动升降压电路。顾名思义就是当电池电压高于LED的工作电压的时候就把输出电压降到LED的工作电压,当电池电压低于LED工作电压的时候把输出电压升到LED的工作电压,这样就产生了恒压恒流,这就是最理想的电路了。
3, automatic lifting pressure circuit. As the name suggests is that when the voltage of the battery voltage is above LED of the output voltage to the working voltage of LED, when the battery voltage is lower than the working voltage of LED to the output voltage to the working voltage of LED, resulting in a constant voltage and current, which is the ideal circuit.