# How Many Amps Do I Need To Charge A 12 Volt Battery?

## How long does it take to charge a 12v battery at 10 amps?

4 to 11 hoursIf you are using a battery charger, a 10 amp charger will take 4 to 11 hours to fully charge the battery, a 2 amp charger will take 2-4 days..

## How do you determine the amperage required to charge a battery?

As we know that charging current should be 10% of the Ah rating of battery. Therefore, Charging current for 120Ah Battery = 120 Ah x (10/100) = 12 Amperes. But due to some losses, we may take 12-14 Amperes for batteries charging purpose instead of 12 Amp.

## Does amperage matter when charging a battery?

It doesn’t matter if the power supply / charger can provide more current then the device requires. Providing less current will prevent charging or slow it down the same as a poorly designed charger can also prevent charging or slow it down.

## Is 11.9 volts enough to start a car?

A flat battery can show 12 volts , but not be good enough to start a car . … 11.9v indicates the battery is completely discharged. Anything under 12.2v means the battery is in a state of discharge, and a healthy battery should show 12.6v in a static state.

## How long does it take to charge a battery at 12 amps?

A 12-volt battery could take up to 12-24 hours to charge fully. When recharging your battery, remember that if it gets too hot while you’re charging it, you need to stop charging.

## How long does it take to charge a 12 volt battery at 1.5 amps?

A trickle charger usually operates at around 2 amps and it is going to take a long time to charge up your 12 volt car battery (read our full guide here). It can take as long as 24 hours to get the battery up to an acceptable charge, depending on how depleted your battery is when you start charging.

## How long does it take to charge a 12v 200ah battery?

24 hours at the C/20 rate will fully charge a 200A battery, assuming it has dropped to 100% depth of discharge, or a terminal voltage of 10.7v. The lower output charger will happily do the job – it will just take 20 times longer, or around 480 hours. A lot depends on the state of discharge of the battery.

## Can you overcharge a battery with solar panel?

Most solar battery chargers range in power between 2 and 18 volts. The lower the voltage obviously has lower power. However, they won’t overcharge your battery. Of course, the higher voltage models will charge your battery much faster than the lower end models.

## 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.

## Should I charge my car battery at 2 amps or 6 amps?

In answer to your question, the six amp charger will charge your battery three times faster than the two amp charger. Six amps is stil a relatively slow charge and should be fine to use for a deep cycle battery. If your charger is telling you the battery is full, place a load on the battery before charging it.

## Can you overcharge a car battery at 2 amps?

A: If you leave the charger connected continuously, even at a mere 2 amps, the battery eventually will die. Overcharging a battery causes excessive gassing — the electrolyte gets hot and both hydrogen and oxygen gas are generated. … On sealed batteries, the buildup of gases could cause the battery to burst.

## Can a battery be too dead to jump?

No, the battery cannot be too dead that it cannot be jump started. A dead battery can be jump started, but there are some guidelines that have to be followed to jump start a dead battery. Often active batteries from other cars act as a best car jump starter.

## Does higher amperage mean faster charging?

Standard chargers that come with iPhones and older Android phones carry 1 amp of current and put out 5 watts of power. New rapid chargers with technology such as Quick Charge support 2 amps and 12 watts or more, potentially charging your phone up to four times faster.

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

A regular car battery that comes with a 12-volt rating actually has a 48 AH capacity. With a complete charge, the battery can provide around one amp for 2 days straight. Or it can deliver around 2 amps for one single day.

## Should I charge my battery at 2 or 10 amps?

A basic charger usually charges at around 2 amps – and so needs 24 hours to deliver the 48 amps needed to fully charge a flat, 48 amp hour battery. But there is a wide range of chargers with different charge rates on the market – from 2 to 10 amps. The higher the charge output, the faster a flat battery is recharged.

## Can a completely dead battery be recharged?

A car battery is considered discharged when the voltage drops below 12 volts. While your vehicle’s alternator can keep a healthy battery charged, it was never designed to completely recharge a dead car battery. … Most of the time, you don’t even have to remove the battery from your vehicle.