# Can I charge a 12v battery with a 12v power supply?

Zachary Poma asked, updated on March 8th, 2021; Topic: 12v battery charger
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##if you want to charge a 12 volt lead-acid car battery with a 12 volt DC power supply which is not a battery charger, then no that won't work. A car battery at full charge is 12.65 volts.

Along with, how many volts do I need to charge a 12v battery?

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.

Either, can I charge car battery with 12v adapter? Your 12v adapter would only be able to raise the battery voltage to 12v, but to charge a car battery fully you would need to raise the voltage to 13.8v. ... A 4A maximum current would be fine and would not cause any damage, but you need a 13.8v source.

Either way, how can I charge my 12 volt battery at home?

Can I use 19v charger for 12v battery?

NO you cannot charge your 12V AGM battery directly with a 19V Laptop power supply. ... So your fully charged state is about 13.8 - 14.5V. Putting two batteries in parallel does not change the voltage required to charge them it simply increases the current capability (increased Ah rating).

### Will a power supply charge a battery?

Batteries can be charged manually with a power supply featuring user-adjustable voltage and current limiting. I stress manual because charging needs the know-how and can never be left unattended; charge termination is not automated.

### Can you overcharge a 12 volt battery?

A 12V lead-acid battery will not be damaged by overcharge if the voltage is kept low enough to avoid electrolysis, and the charging current is kept below 0.2C (5 times less than the Ah capacity). ... If it can put out more current than the battery can take then the battery may overheat.

### Is it better to charge a battery at 2 amps or 10 amps?

It is best to slow charge the battery. Slow charging rates vary depending on the battery's type and capacity. However, when charging an automotive battery, 10 amps or less is considered a slow charge, while 20 amps or above is generally considered a fast charge.

### What voltage is too low for a 12 volt battery?

A healthy 12 volt motorcycle battery should maintain a range from 9.5 - 10.5 volts under the load, for a good 30 seconds straight. If the battery begins to hold and then steadily declines, there is a problem. If the voltage drops to 0 volts, there is a problem. We call this, the open cell.

### Can I charge 12v battery with 15v charger?

A car battery can be charged safely at high voltages as long as the battery is not fully charged. So alternator voltages and car battery chargers voltages can go over 15V safely, as long as the battery is monitored to make sure that it isn't overcharged. These higher voltages allow the battery to be charged faster.

### When a 12v battery is fully charged?

So a 12volt battery will measure at about 12.9 volts when it's fully charged and about 11.4 volts when it is fully discharged. That's a total of 1.5 volts that represents the full range of charge on a 12volt battery.

### How many amps does a 12 volt battery have?

Quick Answer: How Many Amps Are In A 12 Volt Car Battery?? A typical car battery with 12 volts rating has a capacity of 48 Ah. It means that when fully charged, the battery can deliver one amp for 48 hours, two amps for 24 hours and so on.
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