[Upgraded to 3500mAh] 3.5Ah 14.4V Ni-MH Replace Battery for iRobot Roomba R3 500 600 700 800 900 Series Robot Vacuum 510 530 531 532 535 536 540 550 552 560 570 580 595 620 650 660 760 770 780

I ordered 2 of these batteries. One was fine; the other wouldn’t charge. I contacted amazon and a replacement was sent immediately. This one works fine.

I bought this for my 600 series Roomba and it worked one time. Second attempt to charge gave a charging error. I ordered a replacement thinking it was just a bad battery and the first time I tried to charge it I got a charging error. I reinstalled the original battery and it charged just fine.

Delivery was on time and the new battery installed easily and now our Room a cleans the entire house on a single charge

It is to replace the original battery which can only work for 5 minutes now. This new battery can complete a few rooms before return to charging station. I did not measure how long it can last but it is good enough, at least same as original new battery. Very good value for this quality.

This battery failed after only 9 months. Description says there is a 12 month warranty, but Amazon offers no support and says to contact Enermall. There is no contact information for Enermall on Amazon's website. Do not purchase from Enermall.

Battery worked great for a little over a month. Now I'm getting battery error 1 on Roomba 500 series. Seller doesn't give an option to return. Hoping he see's this review and I may adjust accordingly.

Had a Roomba 650 for 5 years and the battery became incrementally worse. I considered buying a new robotic vacuum, but honestly the new specs aren't that impressive and the prices are still holding too high, so I though: eh, why not? Wow. It was easy to install and we charged it over night. My l'il vacuum friend ran around the house for close to an hour and a half on the first run, like he was a racehorse that went to see the "special vet" for a "peppy pill" before the big race! I'm extremely impressed with the run time. Super-happy I bought this battery. Now the poor 650 can waste time bouncing around the room like a drunken, 3-legged cockroach and still have enough time to get most of the floors vacuumed, forestalling the need for a new vacuum a little longer.

I have had my Roomba 650 for 6 years and it's still going strong. This is the second time I've had to replace the battery in all that time because the first replacement battery was only running for about 30 minutes. With this new battery, the Roomba will run an average of 60 minutes and almost 90 minutes if it can't find its way back to the base. I am a little disappointed in the capacity because you would expect much more than 60 minutes run time with 4500 mAh, which is considerably more than the original 3000 mAh, so don't get your hopes up that this thing will run for 90 minutes. As it is, it matches the original battery, which also did 60 minutes run time and 90 minutes on reserve. As for longevity, I've only had the battery for about 2 weeks so I can't tell how long the battery will last. My last replacement lasted almost 2.5 years and I am hoping this one will last 2 more years. By then, it should be time to retire the trusty 650 and get something new. ***** UPDATE 3/29/2019 ***** Bad news. The product has a 1 year warranty but after less than 6 months, the battery now lasts 35 minutes before it gets back to the dock to charge. This is happening consistently so it's not a one-time fluke. Basically, in 6 months, the battery has lost 50% capacity and trying to contact the seller for warranty on Amazon is an exercise in futility. But, will send them an e-mail and see if they respond. Oh, and the best part is this seller no longer sells this item.