The USB port is also a part ofgreen laser pointer

The USB port is also a part ofgreen laser pointer.
There is a series parallel battery problem, here to talk about, in fact, we had junior high school physics: the series current constant voltage of 2 times before; parallel voltage constant current of 2 times before. If your battery is a protection circuit (with anti-overcharge and over discharge function) do not see the following description, the following main protection circuit for lithium batteries do not explain: The new battery is not too much; to the battery in the first use, not too long charging time, charging indicator based solely on the charger can be handled in charge, according to the charger's charging speed of color changes when the lights immediately remove the battery, do not overcharge, recommend charging no more than 3-5 hours; fully charged, the battery should be removed from the charger. 2.4G technology ofgreen laser pointeris also used.
Select the charger to prevent overcharge use charger; in use, in accordance with the requirements of voltage LED flashlight battery, not to abuse, to prevent burning torches; in use, when the flashlight's brightness changed significantly when To turn off the flashlight, to prevent over-discharge, (not the same as cell phone batteries, use the phone to automatically shut down, so the battery will be put off, but can not be reused); tips: LED flashlight in use, to ensure that heat is normal, with Hand holding is the best way, it is recommended to be placed under the torch light heating time in a timely manner with hand a bit to heat; flashlight in use, it is recommended to use 30 minutes off every 2-3 minutes to heat; Note that the battery waterproof drop resistance and so on. The battery can be direct-drive (that is directly linked with a wire at both ends of the battery to the LED connector on the positive and negative) most of the LED, but the current instability, some small, easily lead to shortened life expectancy generation LED light failure, so the control voltage and current flashlight dedicated circuit was born. The difference of IR technology and RF technology ofgreen laser pointershould be made clear.
There are several circuits under: talk about a few common sense before you say, what is the input voltage, current and output voltage and current. Torch power supply current from the battery out of principle, through the circuit to adjust, and then input to the LED to work, so the input current, voltage link circuit means between the battery terminal voltage and current; output current, voltage refers to the circuit and LED's between current and voltage. For example, we usually talk about a circuit's output current is 1A, you must measure the time measurement circuit and the LED anode and cathode current between, many of my friends here have errors, the tail always measure the battery (the battery negative ) and Flashlight (negative input of the circuit) between the current, this is wrong and I often depressed areas, with many customers to me how your flashlight circuit less than 1A, ah, I was depressed I use Forum circuits are known, are excellent quality should, how would there be such a problem that, I realized that are asked in detail about measurement error, sorry here complaints. There should be no obstacle between the emitter ofgreen laser pointerand receiver ofgreen laser pointer.