# Can you use a 12V battery charger as a power supply?

## Can you use a 12V battery charger as a power supply?

Typically yes. The car battery will smooth the output of the charger and it should work just fine.

### Can I use the computer power supply to charge a battery?

Computer power supply is definetly not designed to be connected to battery. Partially discharged 12V battery can have voltage higher than 12V. If you connect it to computer power supply – you may feed power supply with energy. Power supply will “see” too high voltage on its output and will try to lower it to 12V.

Can a 12V battery power a computer?

So the biggest problem is your PC has so many connectors inside and the PC power supply is designed to handle that. As long as you can supply 12v,5v,3.3v, and you might need a small supply of approx 1 amp of -5 and/or -12v.

Can I charge battery with DC power supply?

Yes, if you set the voltage higher than the open circuit voltage of the battery en set the current limit for the required charging current, a variable DC supply will charge batteries no problem.

## Can you start a car with a 12v power supply?

12v would not be sufficient to begin a vehicle with a dead battery – nor would it charge the battery – the charger needs to give a somewhat higher voltage than the thing it’s charging or, in all likelihood the electric will stream in reverse – on the off chance that you look most things with “12v batteries” with them …

### What is the difference between battery charger and power supply?

A power supply is designed to supply a constant voltage to a load. As the load requirements change, it continues to supply a fixed DC level. A true battery charger generally supplies a regulated current, first to charge the battery, and then switches to a regulated voltage mode.

How many amps can a 12V battery supply?

Even though most car batteries are only 6 or 12 volts, a 12-volt battery can produce as much as 600 amps. Amperage can be thought of as the volume of electricity that’s generated, but voltage can be thought of as the “pressure” of the electricity.

Do you need AC or DC to charge a battery?

They’re called alternating current (AC) and direct current (DC) power. The power that comes from the grid is always AC. However, batteries, like the one in your EV, can only store power as DC. That’s why most electronic devices have a converter built into the plug.

## What is the difference between 12 volt charger and 12 volt power supply?

In short – a Power Supply is intended to provide a constant voltage to static applications, whereas a Charger is designed to provide a continuously regulated current to mobile devices, which have an integrated Battery.

### Can you charge a battery with a DC power supply?

You can easily recharge batteries if you have a DC power supply. All that is needed to recharge battery cells is DC current. With DC current, electrons will flow back into the battery, establishing the electric potential, or voltage, that a battery was meant to have when it’s fully charged.

How many watts does it take to charge a 12-volt battery?

For most people, solar panels with a wattage between 100 and 120 watts are enough to charge a 12V battery.

How many watts does a battery charger use?

A charger may be marketed as being capable of charging at 10 amps, but in reality, it may only deliver 50 watts of energy. A 50-watt charger could indeed charge a battery at 10 amps, but only if it’s a 1S LiPo pack. Using our formula above, the practical amperage delivered by the charger is actually 50W/4.2V=11.90A.

## Can I use a 19V power supply on a 12V?

No, don’t use it! The PSU will supply 19V (“voltage source”) and will probably damage the load. There are PSUs that limit output current by dropping/regulating the output voltage (which then can be considered a “current source”), but as long as the required current isn’t constant that wouldn’t work either.

• September 12, 2022