# What is the voltage of a laptop charger?

For mobile phones and other mobile devices like the Kindle that charge with USB, the voltage is typically

**5V**. A laptop charger might be as high as**20V**or 25V. You can usually find the voltage your device needs on the device itself, on the battery, or if all else fails, on the manufacturer's web site.A.

### How many volts is a computer charger?

You could use a Lightning connector plugged into a computer (via USB), an iPhone charger connected to a wall socket, or an iPad charger connected to a wall socket. A PC USB charger delivers 2.5 Watts of power (

**5 volts**at 500 mA). An iPhone charger delivers 5 Watts (**5 volts**at 1000 mA).#### How many watts are in a Volt?

Using Ohms law, you would multiply amperage times volts to get watts. For instance a**12 volt**circuit drawing 2 amps would consume**24**watts of power (12*2=**24**). A 60 watt light bulb powered by**120 volts**in a house would draw .5 amp of current (60/120= .5).#### Can I charge my Iphone with a 2.1 amp charger?

It is possible, however, to deduce from**the**web page Apple created “**Charge the**battery in**your**iPad,” that Apple is aware of this capability and endorses it. Simply increasing**the**current from .5**amps**(USB**charging**cable) or 1**amp**(**the**bundled**iPhone charger**) to**2.1 amps**(**the**iPad**charger**) boosts**the charging**speed.#### How many watts does it take to charge a car battery?

Assuming You have a typical full size auto battery, it is about 50 amp hours. To Calculate how much time You'll need to charge the battery with a**15 Watt**solar charger You'll need: Calculate the Ampere per hour of the charger:**15 Watts**/12 Volts = 1,25 Amperes.

Updated: 2nd October 2019