14.4V 4.5Ah Replacement Battery for Roomba Compatible with Roomba Battery R3 500 600 700 800 900 Series 500 510 531 535 540 550 552 560 570 580 595 620 650 660 700 760 770 780 790 800 900 with brush

Arrived promptly and in good shape. Installed easily and the Roomba works well…

battery fits perfect,and works good

It was simple to replace the old battery and got my roomba back at 100%

For the money, this battery works just fine. I do not know how long it will last, but it charged easily, and my Roomba worked just fine. Plus, it was super easy to install. However, like others' comments the replacement 3 arm brushes supplied were a total waste. My old brush was still okay and had been replaced earlier. I threw away those that came with the battery and so deducted a star. As noted the arms are too high to actually work, and there is no way to flatten them. As the battery is less expensive than other choices, I would just go ahead and buy replacement kit parts as those are not very expensive, and usually include a large brush, a soft roller, filter, and 3 armed brushes. Read the reviews carefully. The arms of the 3 armed brush part should be flat, not arched like those in the battery kit!.

Update - 03/27/23Still working great. The Roomba needs to be juggled a bit to dock properly but that’s not the battery issue. Charge holds good for a good 40 min or cleaning. The brushes with the battery are a great / must have and has been very helpful to us. Overall a good return on our investment to breathe life in our old Roomba.I bought this for my old Roomba 655 series which was giving a charging error code. Definitely cheaper than going through iRobot's 3rd party repair service who wanted a $150 fee for sending them and checking out the Roomba.Initially after replacement the Roomba gave an Error Code 3 warning and was not charging on the dock. Call it a quirk - I loosened one of the case holding screw at the base (top side), which seemed to make it work ! So far so good and I now have a functioning Roomba. Will update as needed. Pleased with this purchase !

My old 655 Roomba finally wouldn't run more than 15 minutes because the battery wouldn't hold a charge. Reviews and price on this were very good so I decided to take a chance. When the battery arrived, I gave it an initial full charge per the instructions. It fit perfectly in my Roomba. The result was over an hour of run time! Very pleased with this result.

AVOID! DO NOT BUY! NOT 4.5Ah!This review is for "14.4V 4.5Ah Replacement Battery for Roomba Compatible with Roomba Battery R3 500 600 700 800 900 Series 500 510 531 535 540 550 552 560 570 580 595 620 650 660 700 760 770 780 790 800 900 with brush", Eagglew Item model number Replacement for iRobot Roomba Battery R3 (ASIN B07Q4TWVHR).The Eagglew battery with brushes shipped quickly and was packaged reasonably in a padded envelope. Inside the padded envelope the battery was boxed in a fitted cardboard box which was just the right size for the battery itself plus a 4"x6" single-sided piece of paper "User Manual". The box was not large enough to also hold the two brushes, and yet the brushes were also crammed into this box, disfiguring them in such a way that they could not be used as received. I will have to see if they can be reshaped.Before installing the Eagglew battery in my Roomba 655 I performed capacity testing on the battery. This battery is advertised as 14.4v and 4.5Ah. It contains 12 Sub-C NiMH cells in series and each cell is rated a nominal 1.2v, hence (1.2v)(12)= 14.4v. If the cells are rated 4.5Ah each, then the energy capacity of this pack would be (14.4v)(4.5Ah) = 64.8Wh. Sure enough, the battery is labeled 64.8Wh.SUMMARYCareful capacity testing shows that the Eagglew Roomba battery delivers less than half of the 4.5Ah capacity as claimed! That's absolutely pitiful. My guess is that this battery contains 2.2Ah cells, not 4.5Ah cells.The Long NarrativeBefore using any rechargeable battery I perform a series of capacity tests using my computerized battery analyzer (CBA). I like to confirm that a battery has the advertised capacity as claimed. Eagglew claims that the battery is 14.4v and 4.5Ah. I typically test batteries by fully cycling them until two consecutive capacity tests indicate the same capacity to within 3%. I choose a discharge rate of 1C (or a max rate which does not exceed my tester's limit of 100W) and I configure the test to stop on NiMH batteries when the cells have been discharged down to 1.0v (i.e., 12v for a 12-cell battery pack). I have performed capacity tests on literally thousands of batteries (NiCD, NiMH, LiIon, LiFePO4, SLA) and my expectation is that a new NiMH battery should be able to deliver 95%-98% of its rated capacity.Why do I perform this sort of testing? It has been widely reported that non-OEM battery manufacturers exaggerate the capacity of the batteries that they sell. I've personally encountered this several times, most recently with an 18v Li-Ion battery which was marketed here on Amazon as compatible with Ryobi 18v tools (see https://www.amazon.com/dp/B08TR82J1D). The compatible 18v battery claimed to be 3,000mAh capacity, but extensive testing revealed that the battery actually delivered less than half of that and the battery had other problems as well.Before testing the Eagglew battery I decided to test my old, used OEM Roomba iRobot XLife Extended Life Battery first, so I could compare results. The OEM battery is rated 14.4v and 3.0Ah or (14.4v)(3.1Ah)= 43.wh. This battery is several years old but has been used infrequently, so my expectation is that it has maybe half of its rated capacity remaining. I configured my tester to draw a gentle 0.5C rate (1.5Ah) and the result came in at 2.195Ah/31.956Wh or about 73.2% of the rated 3.0Ah capacity. That's not so bad for an old, used battery. The new Eagglew battery should have more than twice this capacity.To be fair, I decided to test the Eagglew battery at the same discharge rate as the old OEM Roomba battery, or 1.5A. For the Eagglew which is rated 4.5Ah, this rate would be an extra-gentle 0.333C. The result for the first test was 2.098Ah. That's 30.137Wh or about 46.6% of the rated 4.5Ah capacity. That result is really awful! I recharged using my trusty Turnigy Accucell 8150 charger (configured for a 1.0A charge rate) and measured 2,222mAh delivered to the pack. The second result came in at 2.109Ah/30.515Wh or 46.9% of the rated capacity. Clearly, this is no 4.5Ah battery. As stated earlier, my expectation is that a new NiMH battery should be able to deliver 95%-98% of its rated capacity. For this battery to meet this expectation, the cells in this battery would have to be 2.2Ah cells. If we assume that this battery contains 2200mAh cells, then the results we're seeing would be 95%-96% of that 2.2Ah capacity.Just in case anyone would like to argue that the tests were invalid because the Roomba's built-in charger was not used, I decided to perform a third capacity test on the Eagglew battery after charging overnight with my Roomba 655. The Eagglew battery is a perfect fit for my Roomba and it installed easily. The result for this third test came in at 2.066mAh/29.975Wh, or 45.9% of the ridiculous 4.5Ah capacity claim.I've posted one image of the discharge graphs for these tests, and a second image with a close-up showing where the tests ended at 12v so the measured capacities are more clear. One can see that the old, used OEM 3.0Ah battery out-performed the brand new Eagglew battery whose capacity is rated a highly suspect 4.5Ah. The discharge curve for a 4.5Ah battery should have been more than twice as long as we see for the OEM battery. The Eagglew's discharge curves are not indicative of faulty cells or any other problem. If the Eagglew had claimed a capacity of 2.2Ah rather than 4.5Ah I'd have concluded that the battery met the claim. But Eagglew claims a 4.5Ah capacity, which is absolutely false.Another observation I've made from looking at the discharge curves is that the maximum voltage of the Eagglew battery does not appear to be as high as the OEM battery. I can't imagine that this makes a measurable difference as far as running the Roomba is concerned. But if the cells in the Eagglew battery can't reach quite the same top voltage as the OEM battery, I wonder if the Roomba's built-in charger will slowly "cook" the Eagglew battery over time. This could be the case if the charger continuously "trickle" charges the battery because it believes that the battery never reaches a "full charge", and if so would likely cause the Eagglew battery to fail prematurely. I should emphasize that this is purely conjecture on my part and that I have no evidence aside from the discharge curves to work with.While the battery capacity tests were in progress, I shifted my attention to re-shaping the deformed brushes. I carefully flattened them out on my basement floor and placed a large weight on top, hoping that they'd bend back to the desired form. But after 24 hours like this I could not detect that they'd changed at all. So I decided to try using some heat. I slid the hollow handle of a disposable 3/8" glue brush over the bristles on one arm (see https://www.amazon.com/gp/product/B01LXNQW9W), then held the brush against the ground with just enough force to straighten the one arm. Next I used a heat gun to apply heat for a few seconds. That seemed to do the trick! I repeated on the other two arms. The brush is not perfect, and I did manage to melt/bend a few of the brush's fibers, but the brush is now serviceable. I installed one of the repaired brushes on my Roomba 655 and it seems to work fine.Overall I'd say the Eagglew battery with two brushes is not worth the effort. Eagglew has grossly exaggerated the battery capacity and the battery itself has less than half of the advertised capacity. This means that when brand new it has only about 2/3 of the energy of the original Roomba 3.0Ah battery. In my case, the new Eagglew battery has less energy than the old, used original battery that I had planned to replace. The Eagglew brushes arrive mangled to the point that they were unusable. But with some effort and a heat gun I was able to salvage these.

Works well to power my roomba