How Long Does It Take To Charge A Car Battery With A 10 Amp Charger?

Updated October, 2020
Call an insurance expert
Our team will help you find the lowest insurance prices.
866-996-3156

Depending on battery size, charging a car battery with a 10 amp charger can take between 2 and 7 hours. The larger and more drained the battery is, the longer it takes to charge. Consider your timeframe when deciding how many amps to use, and never let the battery overheat as it's extremely dangerous.

Better understanding a battery Amp Hour

Amp hours are how many amps an hour a charger can put out. If a battery has 36 amp hours it can output 1 amp for 36 hours, 3 amps for 12 hours, 6 amps for 6 hours, so on and so forth. A 10 amp charger puts out 10 amps an hour to the battery.

Determining charge duration

If you know how many amp hours your battery has you can calculate how long it's going to take to charge. it isn't recommended to go above a 10 amp charger because "fast-charging" can cause a battery to overheat and flood. For these examples we are using a 48 amp battery.

Using 2 amps

Using a 2 amp charger on a 48 amp battery takes 24 hours to charge from empty. The charger puts out 2 amps an hour and has to work for 24 hours to reach 48 amps.

Using 4 amps

Using a 4 amp charger on a 48 amp battery takes 12 hours to charge from empty. The charger puts out 4 amps an hour and has to work for 12 hours to reach 48 amps.

Using 10 amps

Using a 10 amp charger on a 48 amp battery takes take 4.8 hours to charge from empty. The charger puts out 10 amps an hour and has to work for 4.8 hours to reach 48 amps.

Using 12 amps

Using a 12 amp charger on a 48 amp battery takes 4 hours to charge from empty. The charger puts out 12 amps an hour and has to work for 4 hours to reach 48 amps.

If the battery won't hold a charge, it's time to replace

Replacing a battery isn't very difficult and can be done at home. As long as you have the proper safety equipment it's low risk. While you're taking the old battery out, it's worth noting to not put new batteries on concrete as it drains them.

Replacing your battery at home can be dangerous if not done properly. When you're starting make sure you have the proper safety equipment on and proper tools on hand. Disconnect the positive lead first and then the negative. Once you have fully removed the battery from the car, then place the new one in its place. Connect the negative lead first and then connect the positive  lead. Make sure all connections are tight and start your car to make sure the battery works and stays charged.

If you replace your battery at home the only cost to you should be the cost of a new battery. New batteries run between $90 and $200 depending on the brand. The whole process should take around 10 minutes to make sure all connections are tight and secure.

How to tell when it's my battery or another car issue?

Sometimes an issue may seem like a battery issue, but it's an issue with another part of your car. The most common culprits are your alternator, a blown fuse, or a short in the electrical wiring. Differentiating these from a battery issue is important to save you time and money.

  • If you charge your battery and it doesn't hold that charge, get your alternator tested. The alternator is responsible for charging the battery as you drive.
  • A short circuit can drain your batteries power. If your battery is struggling to hold a charge get it tested as well as your electrical circuits.
  • If your headlights or interior lights are flickering or aren't working and you have changed the bulb, check the fuses. They are easy to replace and cheap to buy.

When the time arises, is my insurance going to be enough?

When it comes to car insurance, there are several factors to consider beyond monthly cost. A policy that covers you when you need it, has a low deductible, and offers several discounts can be hard to find - which is why we've done the work for you.

Get instant quotes tailored to your needs - fill out our short form, today!

Call an insurance expert
Our team will help you find the lowest insurance prices.
866-996-3156