A USB car charger typically draws a very small amount of power from the car's battery, so it should not noticeably drain the battery under normal usage. However, leaving a device charging for an extended period of time while the car is turned off could potentially drain the battery, especially if the car's battery is already weak or old. It is generally safe to use a USB car charger while the car is running or for short periods of time when the car is off. **

Not every USB charger is suitable for charging a phone. It is important to check the output voltage and current of the charger to ensure it is compatible with the phone's charging requirements. Using a charger with the wrong specifications can potentially damage the phone's battery or charging port. It is recommended to use the charger that came with the phone or a reputable third-party charger that is compatible with the phone's specifications. **

To build a USB charger for a bicycle from an old mobile phone charger, you can start by disassembling the old charger to access the USB port and wiring. Next, you will need to connect the wiring to a dynamo hub or a wheel generator on the bicycle to generate power as the wheel turns. You may need to use a voltage regulator to ensure a steady and safe output of power to the USB port. Finally, you can encase the components in a weatherproof container and attach it to the bicycle frame for easy access and use while riding. **

To build a USB charger for a bicycle using an old mobile phone charger plug, you will need to first disassemble the mobile phone charger plug to access the wires inside. Then, you will need to connect the positive and negative wires from the plug to a voltage regulator to ensure a steady 5V output. Next, you can connect the output of the voltage regulator to a USB port, which can then be mounted onto the bicycle. Finally, you can connect your mobile device to the USB port while riding your bicycle to charge it using the power generated from the movement of the bike. **

Yes, a USB LED strip can be operated with a mobile phone charger as long as the charger has a USB port. The LED strip can be plugged into the USB port of the mobile phone charger, and it should be able to power the LED strip without any issues. However, it is important to check the power output of the charger to ensure it is compatible with the LED strip to avoid any damage. **

It is unlikely that the USB stick is still salvageable after being plugged into a car charger. Car chargers typically provide a higher voltage than standard USB ports, which can damage the internal components of the USB stick. It is recommended to try using the USB stick on a computer to see if it is still functional, but there is a high chance that it may be permanently damaged. **

Yes, a newer smartphone can be charged with an older micro-USB phone charger. The micro-USB port is a standard charging port that is compatible with many different devices, so as long as the charger provides the necessary power output, it should be able to charge the newer smartphone. However, it's important to note that some newer smartphones may require a higher power output for fast charging, so using an older micro-USB charger may result in slower charging speeds. **

There could be several reasons why your car is not recognizing your phone over USB. It could be due to a faulty USB cable or port in the car, a software issue with either the car's system or the phone's operating system, or compatibility issues between the car and the phone. It's also possible that the car's USB port is not designed to recognize phones for media playback or other functions. Try using a different USB cable, restarting both the car and the phone, and checking for any software updates for both the car and the phone to troubleshoot the issue. If the problem persists, it may be helpful to consult the car's manual or contact the manufacturer for further assistance. **