# Can I charge 5V with 12V?

No, the charger needs to have an output a little higher than the battery you are trying to charge. If you use less, no charging will occur. Can I charge a 12V battery with a 5V charger? Presuming that you are talking about a charger as an integrated product purchased off-the-shelf, you cannot.

## Can you power 5V with 12V?

The device will very likely burn out. In addition, depending on what the device is and the capacity of the 12V supply, connecting a 12V supply to a device rated 5V max could lead to a hazard - fire, explosion, etc. Device consists of components which are rated for a given voltage and current.

## Can I use 12V adapter for 5V router?

No. If you are going to use another adapter use one with the same voltage and at least the same amperage. If you use one with less amperage then the device might try draw more juice and burn out the new adapter.

## Can we charge 6V battery with 12V charger?

This will run your battery dry and create a thermal runaway scenario, which is very dangerous. Again, some people use a 12V charger to get their 6V battery jump started, but it is never advisable to use a 12V charger to try to fully charge your 6V battery.

## Can I use 12V to charge my phone?

Yes - all you need is a charger that works off 12 volts and there are lots of those available. The charger will use very little power, about 6 watts for about 2 hours typically. Your bike battery if fully charged could deliver 6 watts for about 5 hours.

## Is 12V enough for fast charging?

Most phones and other devices are capable of handling 5V/2.4A. For fast charging, manufacturers bump the voltage up from 5V to 9V or 12V and beyond, or increase amperage to 3A and above.

## Can I use a 12V power supply as a charger?

YES, you can use 12V DC power supply for charging car battery. After charging for 18 hours, check battery voltage. If it is 11.5V or more, start engine (car) with it and keep it charging for at least 30 min.

## Can you use a 12V adapter for a 6V device?

It depends on what the device is. If the device has its own internal switching regulator, the voltage probably won't be a problem, but since the 12V power supply has a lower maximum power (12V * 0.35A = 4.2W, and 6V * 1A = 6W), it may draw too much power and the power supply will be damaged.

## Can you charge a battery at any voltage?

You have to apply a voltage that is higher than the battery voltage in order to get it to charge. For a 12v lead acid this is typically 14.4 v (fast) and 13.8 (standard) and maybe 13.1 (maintainance.)

## Can I charge a 5v battery with a 6V charger?

You can't charge a battery using a charger which produces less than the voltage of the cell it is charging. Electricity doesn't work that way.

## Can I use a 12V power supply on a 5V LED?

A 5V LED must not be run on 12V.

## How do I get 5V from 12V?

To convert 12V DC to 5V DC, you will need to use a DC-DC voltage converter, also known as a voltage regulator. A voltage regulator takes in a higher voltage input and produces a lower voltage output that is regulated to a specific value.

## Can I use 12V 2a for 5V 2a?

Yes, it is absolutely safe to charge a device with a charger that has more current capacity than needed. Since the voltage is held constant (5V), the only factor that determines current draw is the load (another term for resistance) the device places on the charger.

## Can 12V and 5V share the same ground?

Unless there is an (optical) isolator somewhere in the relay circuit, the 5V and 12V parts should share the same ground. But you should make sure the relay circuit can handle the +12V input signal.

## How do I get 5V out of 12V battery?

Connect 12v +ve voltage to 7805 input pin and -ve to 7805 GND pin. You will get the output of 5v at output pin. You can also give 12v or 9v as input voltage.

## What is the difference between 5V and 12V?

The main disadvantage of the 5V system is that voltage drop is a more significant limiting factor. However 5V systems are much more power efficient than 12V systems; a 5V linear system will always be 2.4 times more efficient than it's equivalent 12V system.

## What happens if you use a 12V charger on a 5v battery?

What if you charge a 55-volt battery with a 12-volt charger? You would need to use a DC-DC inverter to step up the voltage. It will work fine then. But if you connect the 12v charger directly to a 55V battery there will be no charging and you may even damage the charger.

## What happens if you charge a battery with the wrong voltage?

This could cause the adapter to overheat or fail. Or, the device may power on, but the adapter may not be able to keep up, causing the voltage to drop (see voltage too low above).

## Does voltage matter when charging a battery?

Charging a battery requires a higher charge voltage, namely 14.4 or 28.8 V. If the charge current drops at this (higher) charge voltage, it will take much longer for the battery to be charged.

## What happens if I use a higher voltage adapter?

An AC adapter supplying electricity at a higher voltage than required will cause the connected device to run hotter. Sending power at a higher voltage will also shorten the lifespan of the device and may fry its internal circuits.

## Can I use a 10V adapter for a 5V device?

you cannot use a 10V charger instead of a 5V for your mobile. Since the mobile is rated to be used with 5V charger, using one with 10V can be hazardous and may also cause irreparable damage to mobile.

## Can I use a 9v power supply on a 5V?

Simply No. Your device will probably be burnt. You will have to step down the voltage using a DC to DC converter or by using a specific resistor. Can I use a 6V adapter instead of 5V?

## Can a USB port handle 12V?

Note - your USB port must be equipped for high current charging (2.1A or greater). Some USB ports are 500mA rated. The device will work perfectly, but will not be able to provide the full 1A current at 12V.

## What can you plug in 12V?

With 12V sockets you can connect a variety of devices, like a mini-fridge, tyre inflator, and can even charge your laptop. You need to buy an extra adapter to connect your phone or other USB powered devices to the 12V socket.

## Can I charge a small battery with 12V charger?

Car battery chargers are designed to work with big SLI batteries and charge at a high amperage. For small batteries like 6V 5Ah or 12V 9Ah this will be too much amperage. Although it will charge the battery, it will significantly reduce the life time of the battery and will likely cause permanent damage to the battery.