Can a computer power supply charge a car battery?

Can a computer power supply charge a car 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 I charge a 12V battery with a 24v power supply?

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.

How many amps do you need to charge a 12 volt battery?

A 12-volt automotive battery, for instance, takes a while to charge. In fact, fast charging for this kind of battery is not recommended. 10 amps are the recommended current. This is a slow charge.

Can you use a jump pack to charge a battery?

Can a portable jump starter charge a battery? A portable jump starter cannot charge a battery. It is designed to give an instant powerful flow of current sufficient to get the battery working, after which the vehicle’s alternator proceeds to actually charge the battery.

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

A power supply is designed to supply a constant voltage to a load. A true battery charger generally supplies a regulated current, first to charge the battery, and then switches to a regulated voltage mode.

Can I charge a battery with another battery?

In order to charge a dead car battery, a set of jumper cables and a functional car with a charged battery is required. You will then have the ability to connect the batteries to one another using the jumper cables, and recharge the dead battery by transferring energy from the functional battery.

Why is my PC power supply not 12V?

PC power supplies fall short of 12V on the 12V output unless there is a load on the 5V output. Apparently, the 12V regulator does not work unless there is sufficient load on the 5V side. With no load on the 5V output, my PC power supply produces less than 11V on the 12V output.

How much power does a 12V power supply produce?

Apparently, the 12V regulator does not work unless there is sufficient load on the 5V side. With no load on the 5V output, my PC power supply produces less than 11V on the 12V output. With an appropriate load on the 5V side, the 12V side produces just over 12V.

Can You charge a laptop on a 12 volt converter?

Anecdotally, owners have reported that they are able to use 12 volt converters to keep their computers battery levels static, but not to charge the batteries. Still, at over 4 years old, it is getting to be about time to replace this little guy.

What kind of resistor do I need for a 12 volt charger?

You should also put in a couple load resistors to make sure that the power supply pulls itself into regulation. A 10 ohm 25 watt resistor across the 12 volt output, and a 4.7 ohm 10 watt resistor across the 5 volt output is usually enough to make sure the supply will start up and run properly.