What Type of Batteries Does Roomba Use? (Size & Compatibility)

Last updated on April 11th, 2024

All Roombas are powered by rechargeable batteries. Each vacuum series is designed to use a specific type of battery. It depends on the shape and size of the vacuum itself. In this article, we have covered all the major types of batteries. We have also made it abundantly clear which model uses which type. Scroll down to find out.

So, what type of batteries does Roomba use?

Roomba generally uses a Lithium Ion battery. But some models also use Nickel Metal Hydride batteries. Different models use batteries of different current ratings and sizes. It completely depends on the model. These batteries are replaceable when needed and interchangeable between two compatible models.

A Li-ion Battery used in Roomba
A Li-ion Battery used in Roomba

Are C-sized batteries used in Roomba?

No, C-sized batteries are not used in the Roomba vacuums. They are very small and cylindrical in shape. They are usually non-rechargeable batteries that need to be thrown out and replaced when drained. These vacuums require a rechargeable Lithium Ion or NiMH type, which is usually rectangular in shape.

But C-sized batteries are used in virtual wall barriers. They are small devices that can easily fit two of these batteries. They give the virtual wall device a long runtime.

Do all Roombas use the same battery?

No, all Roombas do not use the same battery. Each model is designed to hold a specific type. The table below shows several models and the type they are compatible with.

iRobot's XLife battery compatibility with different models
iRobot’s XLife compatibility with different models
BatteryCurrent RatingBattery TypeCompatible with models
1800 mAh Lithium Ion1800 mAhLi-Ion960, 614, 615, 640, 652, 665, 670, 671, 675, 677, 680, 685, 690, 695, 801, 805, 850, 860, 877, 890, 891, and 895
3300 Lithium Ion3300 mAhLi-Ion960, 980, 985, 614, 615, 640, 652, 665, 670, 671, 675, 677, 680, 685, 690, 695, 801, 805, 850, 860, 877, 890, 891, and 895
Lithium Ion for e & i series1800 mAhLi-Ione5, e6, e7, i1, i2, i3, i3 Evo, i6, i7
2210 mAh Li-Ion2210 mAhLi-Ioni4, i5, i8, j7, j9
Lithium Ion for s9 Robot Vacuum3300 mAhLi,-Ions9
3000 mAh Li-Ion3000 mAhNiMHEntire 500 series, 760, 761, 765, 770, 772e, 774, 775, 776, 780, 782, 782e, 785, 786, 790, 618, 620, 630, 635, 645, 650, 655, and the 660, 870, 880
Different Roomba batteries

From the above table, we deduce that most models of the 600 series are compatible with 1,800 mAh and 3,300 mAh Lithium Ion batteries. You can use the 1,800 and 3,300 mAh batteries interchangeably because they have the same voltage rating, i.e., 14.4 V, and the same dimensions.

Please note that using the 1,800 mAh will give you a shorter runtime, as it stores less energy. It charges faster but also drains faster. While for the 3,300 mAh, the runtime is higher. But at the same time, the charging is slower.

Types of batteries used in Roomba
Types of batteries used in Roomba

Important deductions from the above table:

  • The 700 series uses the Extended Life NiMH.
  • Most of the 800 series models use the same one as the 600 series.
  • The e series and most of the i series are compatible with the green-colored 1,800 mAh.
  • Some of the i series models use the same black-colored 2,210 mAh as the j series models.
  • The s9 has a different battery of its own.

Read a similar article: How to check Roomba battery level?

Are Roomba batteries interchangeable?

Yes, some of the Roomba batteries are interchangeable. You can use the battery of one model for another. But you have to make sure that it is the same type. The dimensions and voltage ratings should match both batteries. Then only you can interchange the batteries of two vacuums.

For example, you can interchange the batteries of 960 and 675. It will work without a hiccup. But you cannot use the s9’s battery for any other model because it is designed explicitly for the s9. You also cannot interchange batteries of i8 and i7 as both have different current ratings.

Roomba battery size

By now, you must have understood that you cannot just use any type for any model. There has to be a match both rating-wise and dimension-wise. If you don’t want to use an official iRobot replacement, you will have to find the one that matches the specifications of the original one. We consider the current rating, but looking for the dimensions could slip our minds.

Note: A battery with a different size but the exact capacity is totally useless for Roombas.

To make the choice easier, we have compiled a table with the dimensions of commonly used iRobot batteries.

1800 Lithium Ion1.8 in x 5.5 in
3300 Lithium Ion1.8 in x 5.5 in
Lithium Ion for e & i series1.71 in x 3.54 in
2100 mAh Lithium Ion1.98 in x 2.02 in
Lithium Ion for s9 Robot Vacuum2.77 in x 3.43 in
iRobot XLife Extended Life10 in x 5.98 in
Roomba batteries and their sizes

Can you replace your Roomba battery?

Roomba battery
Roomba battery

Yes, you can replace your Roomba battery. In fact, it is necessary to replace it when you are not getting the desired performance. If it is charging slower or discharging faster, it’s time to consider a replacement. You have to replace your previous one with a new one with the same specifications for optimal performance.

You can buy the replacement battery on iRobot’s official website. Or, you can choose from one of the Original Equipment Manufacturer (OEM) replacement batteries.

Note: You cannot fit any battery in any model. It is very important to choose the right one. Otherwise, you will just have a useless piece in your hand.

Choosing the right replacement battery

Choosing the best Roomba replacement battery is important. Check the points listed below in order to find the correct one for your vacuum.

Check the model number

Your vacuum model number will tell you which series it belongs to. But it will also help you identify which type it uses. You can refer to the above table to identify which type you will need to buy. Without knowing the model number, you cannot identify which one will be compatible with it.

Proper voltage ratings

All models do not use batteries with the same current and voltage ratings. The most common current ratings are 1800, 2210, 3000, and 3300 mAh. These batteries mostly have a voltage rating of 14.4 V. Refer to the table given above to make sure whether a particular battery is compatible with other models or not.

Check the battery dimensions

The size is equally important when choosing a replacement battery. Your new one should fit exactly in the compartment of your vacuum. You can refer to our above size chart to determine the exact dimensions. Ensure that the dimensions of your replacement model match the old one.

Choose a reputed manufacturer

There are several manufacturers that sell batteries that are compatible with Roombas. But not all of them are reliable. Some give a poor performance while others get damaged quite early. That is why it is important you choose a reputed manufacturer. You don’t want to save a few bucks at the cost of needing a new one sooner than expected.

Note: We recommend using the iRobot batteries for your Roomba. While third-party options look impressive, they can reduce the lifespan of your vacuum.


Each Roomba series has a different battery. Though their primary composition is the same, they vary in different aspects. All of them are Lithium-ion batteries. But they have different sizes, pin orientations, and capacities. Their charge and discharge time also varies depending on the vacuum model.


Does Roomba use lithium batteries?

Yes, Roomba models use lithium-ion batteries.

How long does a Roomba lithium battery last?

A Roomba lithium battery usually lasts for 2 to 3 years. After that, you have to replace it.

What battery does the Roomba i7 use?

The Roomba i7 uses a 1,800 mAh lithium-ion battery.

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Sarah Williams

I love writing stuff that's easy to read and fun to learn from. Beaches are my happy place—I just can't get enough of the sand, the waves, and the salty breeze. And you know what else? I'm totally into smart home gadgets! They're like magic tricks that make life easier at home.

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