# Question: How Long Can You Leave A 10 Amp Charger On A Battery?

## 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 it OK to start a car with a battery charger on it?

Yes, if the battery is charged, it won’t make a difference if charger is connected or not. But No, if the battery is discharged, it won’t start anyway since a charger cannot source enough current. … It won’t hurt the charger, the battery or the car.

## Can a trickle charger ruin a battery?

Leaving a battery connected to a trickle charger for too long can lead to overcharging, causing damage to the battery. … Although they can’t recharge a dead battery, they can be used frequently and left connected to a battery without any risk of overcharging.

## Can a completely dead battery be recharged?

It is possible to recharge a dead battery, and depending upon the situation you are in, a dead battery is generally an easy fix, whether you are stuck in your garage and can handle it yourself or you are in the middle of nowhere and need professional, quick, and efficient service in the blink of an eye.

## What should a 12 volt battery read when 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.

## Can you overcharge a car battery at 10 amps?

Charging your battery at the 10-amp rate is fine to get your battery back into service. But if you don’t want to go through this drill, buy a battery maintainer (as opposed to a charger) that will charge it as necessary and then turn itself off until the battery voltage drops again.

## How long can you leave a battery charger on at 2 amps?

24 hoursA car battery is typically 48 amps. This means that a 2 amp charger will take 24 hours. A 10 amp charger, on the other hand, will take 5 hours. For a car battery in most cases, it is okay to use a 10 amp charger and is normally the recommended amount.

## How many amps does a car battery need to start?

Starting the engine will require 250 amps for a half second, and the most current a 1.5-volt AA battery can produce is 10 amps. Given the above, you’d need to start with a string of eight AAs to get your necessary 12 volts.

## What amp should I charge my battery at?

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.

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

25 ampMost battery manufacturers recommend sizing the charger at about 25% of the battery capacity (ah = amp hour capacity). Thus, a 100 ah 12 volt battery would take about a 25 amp 12 volt charger (or less).

## How long can you leave a battery charger on a battery?

If you are concerned about the state of charge then connect your charger up overnight for several nights. If your charger has a 2 amp setting, just leave it on all day. At 6 amps, maybe 4 – 8 hrs or so depending on it’s deadness. Don’t bother looking at 30 minutes.

## Can you leave a car battery charger on too long?

If you leave a car battery charger on your car for too long it can damage your car battery rendering it useless. … If you leave a car battery charger on a car battery for too long it will overcharge the battery and cause the acid inside the battery to evaporate which will cause your battery to no longer to hold a charge.

## 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.

## Should I charge my battery at 2 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.

## Is it safe to leave battery charger on overnight?

Even though there is no risk of overcharging with the use of a high quality charger, the battery should not remain connected to the charger for more than 24 hours. A full charge is usually achieved by charging overnight. … Even after a deep discharge, some chargers enable at least partial reconditioning of the battery.