12V Quick Charge 3.0 USB SUV Car Charger Waterproof 18W

Mobile phone chargers can be roughly divided into travel chargers, cradle chargers and maintenance chargers. Generally, users mainly contact the first two. And the most sold on the market is the travel charger.
There are also various forms of travel chargers. The common ones are the cheap duck egg-shaped miniature travel charger, the ordinary desktop card board charger, and the high-end desktop charger with crystal display. Mobile phone charger, also known as: mobile phone adapter, is actually composed of a stable power supply (mainly regulated power supply, providing stable working voltage and sufficient current) plus necessary control circuits such as constant current, voltage limiting, and time limiting. The output parameters marked on the charger (referring to the line charger): such as output 5.0V/1A, output 5.0V/1500mA-11200... refers to the relevant parameters of the internal regulated power supply. Understand this truth, you will know that a (good quality) mobile phone charger is easy to change into a good quality regulated power supply.
The chargers of lithium-ion (li-ion) batteries commonly used in mobile phones use a constant-current and voltage-limited charging system, and the charging current is generally around C2—that is, the charging rate is two hours. For example, a 500mAh is charged at 250mA in about two hours 4. Constant voltage charging after 2V.
The lion is not suitable for the -DV/DT detection fast charging method used by the NIMH advanced fast charger, because the lion has a strict limit on the charging current. Lithium ion (Li+) is very active, and high current charging is prone to danger. The general user contacts are mainly the first two. The most popular travel chargers on the market are travel chargers. There are also various forms of travel chargers. The common ones include cheap duck-egg miniature travel chargers, ordinary desktop card board chargers, and high-end desktop chargers with LCD display. device. In view of the fact that most mobile phone users are non-professional users, the chargers basically have the function of full self-stop, and most of the travel chargers are fast chargers, and the charging time is about 1-3 hours. Many chargers on the market advertise that they are controlled by microcomputers, including some very cheap duck-egg-type miniature travel chargers. In fact, strictly analyzed from the charging circuit, only a small number of chargers can be truly controlled by microcomputers (MCU control). .
Some manufacturers claim to be "microcomputer control" when they use integrated blocks on the charging circuit. In fact, many low-cost design integrated blocks are cheap op amp integrated blocks, while some dedicated charging control integrated blocks have higher unit prices. , generally used in relatively high-end or brand-name chargers. So we can't trust the so-called microcomputer control, especially the cheap products. Many products are similar in appearance but have very different internal circuits, and their performance is also very different.
1: This is a QC3.0 intelligent fast charger, with voltage display, high voltage warning, it can display charging rate, there is a switch that can freely switch the mode of display and turn on/off the power.
2: Press the switch lightly to turn on the power, it can display the real-time voltage after the full-screen lights up for 2 seconds, and then press the button once again to switch to the red power indicator. Both display modes can be freely switched by the button, Press and hold the switch for two seconds to turn off the power of the device. After turning off the power, it means that the device has cut off the power input and then achieve the the effect of saving electricity.
3: When the input voltage exceeds 14.6V, the red indicator light is on (warning function, it indicates that the input voltage is too high)
4: When the power is turned on and the USB charging is performed, the flowing of color screen indicates that it is in charging; it will reflect the speed of charging according to the flowing rate of color screen . When the mobile phone is fully charged, it will light up on the full screen. Two minutes later, It will display the real-time voltage again . The display mode can be switched to a separate red indicator light by pressing the switch lightly. Press and hold the switch for two seconds to turn off the power of the device.
5.Multi-purposes: supply power for cellphone, tablet PC, GPS and other USB-devices,Wide Application: cars, motorcycles, ATVs, SUVs, UTVs, Boats, etc
6.Press button once,turn on power or turn off the voltmeter,long press button to turn off power.

Specifications:
Product material: ABS
Product Color: Black
Type: A model 5V 4.8A(2.4A+2.4A),B model QC 3.0+PD(optional)
QC3.0 USB Output : DC 5V/3A;9V/2A;12V/1.5A
Type PD Output : DC 5V/3A;9V/2A;12V/1.5A
Size: 50x36.8mm

Note:
1.Transition: 1cm=10mm=0.39inch
2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.
3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

Package includes:
1 X Car USB Charger with LED Voltmeter ON OFF Switch