|Product Dimensions||2.3 x 0.7 x 0.7 inches|
|Item Weight||0.8 ounces|
|DC input||12V-24V, 10~30V, 3A max|
|Usb output||4. 8A Output|
|Usb technology||Smart 2. 0|
1. Will this drain your car battery if you leave it plugged in permanently?
This charger draws a minimal amount of current to illuminate its blue LED. This only occurs if your car accessory jack has power applied to it even when your car is off. I have a 2017 Mazda CX-5, and this vehicle turns off the dash jack when the car is off. It leaves power on to the second jack in the driver's right armrest storage compartment, and the third jack in the cargo area. In any event, the current drawn by the LED, no device plugged into the charger, is only 40% of another popular competitor I tried. It would take many weaks to drain the car battery if you don't drive your car. It's likely that other systems in your car draw significantly more idle current from your battery. I don't worry about it.
2. Will it charge a Go Pro hero 3?
It is a USB charger. It will charge whatever utilizes a USB charging port.
3. Does it get hot?
I have not had a problem with it getting hot.
4. I have a huawei cell phone, can I use the cable charger to hook it up to this car phone charger?
as long asthere is a usb connection for the car charger the answer is yes