# Quick Answer: Can Use Lower Voltage Charger?

## Can I use a 19v charger for a 20v laptop?

20v can be used for 19v as long as the current rating of 20v is the same or higher but only temporarily.

Best to charge the battery and the then unplug and run the laptop, notebook etc on their batteries themselves to ensure the correct input to the circuitory.

Runng 20v for 19v directly is not advisable..

## What happens if the amps are too high?

A higher voltage than a device is designed for will most likely blow up some components, but amperage is derived from how much current is actually drawn, based on the device’s resistance, so having “too much” is not a problem and will do no harm.

## Can I use 19v charger for 12v?

19V is generally going to fry any device that was designed to run at 12V (especially consumer products). And while it’s not very likely it might also catch fire. For a AC adapter to work you will need one with the exact voltage (12V) and an equal or higher current rating (1.5A or more).

## What happens if you use a higher voltage charger?

Voltage too high – If the adapter has a higher voltage, but the current is the same, then the device will likely shut itself off when it detects an overvoltage. If it doesn’t, then it may run hotter than normal, which can shorten the life of the device or cause immediate damage.

## How do I convert 12v to 5v?

Convert 12V DC to 5V DCStep 1: Take All Components As Shown Below and in Pictures. Components required – … Step 2: Connect Input Power Supply. 7805 voltage regulator contain three pins.In which we have to give power supply on pin-1 and pin-2. … Step 3: Output Power Supply. … Step 4: Wiring Is Completed. … Step 5: Checking.

## Can I use a 19.5 V charger on a 19v laptop?

Voltage: 19.5V and 19V is a relatively small voltage difference. It is most probably safe to use as long as: The current of the charger is the same or higher than that of the laptop. … The output power (Amps * Volts) of the original and the new charger differs in 0.6 Watts, the 19.5V charger having more output power.

## Is it OK to use a higher amp charger?

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 I charge my laptop with a lower voltage charger?

Using a charger with the wrong voltage rating can potentially damage your laptop. This is typically caused by too high voltage. But using a charger with too high current won’t damage your laptop. Using a charger with too low current rating might fry the power supply, but not the laptop.

## Can I use a 12v power supply on a 5v?

It is Ohm’s law. Your device is R and 12/5V is V. Current is decided by Ohms law, I=V/R. With 12V your device will draw double the current and gets heated up because all current limiting values of your device are calculated for 5V source.

## What voltage should I charge my battery at?

The typical charging voltage is between 2.15 volts per cell (12.9 volts for a 12V 6 cell battery) and 2.35 volts per cell (14.1 volts for a 12V 6 cell battery). These voltages are appropriate to apply to a fully charged battery without overcharging or damage.

## Can you charge a laptop with 12v?

No, since most of the laptops need a 16v power supply, powered by a 19.5V, 4.5 amps charger. The 12v battery may not be able to power the laptop. Car adaptors could be used, instead.

## Is 2.4 A fast charging?

Most phones and other devices are capable of handling 5V/2.4A. For fast charging, you’re looking at something that bumps the voltage up 5V, 9V, 12V, and beyond, or increases amperage to 3A and above. Keep in mind, your device will only take in as much power as its charging circuit is designed for.

## Can I charge with higher voltage?

A higher voltage will cause too much current to flow during charging and reduce the battery life. Over charging a battery (too much current due to too high voltage) causes heat and loss of electrolyte in wet cells.

## What happens if I charge a 12v battery with a 24v charger?

Yes, if you regulate the voltage down to the right amount. If you just plug a 12 volt a battery into a 24 volt charger it will die in a matter of hours.

## Are 12v LEDs brighter than 5v?

5V is brighter than 12V as the 12V bullet pixels use half the current to stay somewhat close to 5V efficiency. Close, but 5V is still more efficient. So a 5V display will be brighter and use less power than a 12V display.

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

I know that 12v can run longer distances, but will use a lot of power. While the 5v will use less power, but will be limmited to shorter distances. The voltage doesn’t imply power. 1 amp of current at 12v uses 12 watts of power, yet 3 amps at 5v uses 15 watts of power.

## What is the maximum voltage to charge a 12v battery?

Although a battery is called a ’12 volt’ battery, its voltage varies from about 12.6 volts down to 10 volts when it is discharging and can rise to 15 or 16 volts during charging. It is very important, however, to limit the maximum battery voltage during charging otherwise the battery will be damaged.

## Does higher voltage mean faster charging?

Greater current and higher voltages charge batteries faster, but there’s a limit to what they can take. Smartphone batteries charge when a current passes through them. Greater current and higher voltages charge batteries faster, but there’s a limit to what they can take.