Powerextra Roomba Replacement Battery(3500mAh) Rechargeable for Irobot Roomba 500 510 530 532 535 536 540 550 551 562 570 572 580 590 610 760 770 780 790 800 870 880 Vacuum Cleaners590 610 760 770 780 790 800 870 880 Vacuum Cleaners

Update: Powerextra went out of their way to send me a message to me and made arrangement for me to send the battery back and they supplied me with a new battery. Thank you very much.I will see how this one works.I'm not real happy with this battery. I received my battery Dec. 26. I ended up having to reset the battery and let it charge for 72 hours. It ran pretty good for about a month and I had to reset again. I have done that 3 times but this last time it ran good for 1 day. Now it only runs for about 20 to 30 minutes and starts acting crazy and I have to charge it again. So after a little over 2 months it looks like I am going to have to order another battery. Maybe this one just was a bad battery. Surely a batter should have to last more then a couple of months before quitting. It runs down to fast.After I order another one I will update and let you know how the next works.

The battery arrived nicely packaged and fully charged. My Roomba 655 'accepted' the battery no problem and could clean up a very large area without charging.Unfortunately that's where it all ends. The robot had hardest time mounting on the charging station and after a couple of days started giving 'Charging Error 1' immediately after I would manually put it to the base. Tried this with 2 batteries. Eventually bought a more expensive battery from CyberTech and the robot's happy.

I've had the new battery in for about a week and it's been great. It really brought some life back to our two-year-old Roomba. Dimples can now go through 2 or 3 clean cycles in a row without a problem - a major improvement over before when he could hardly run 20 minutes. Time will tell how long this great charge will hold up, but for now I couldn't be more pleased with it. It was significantly less than other batteries and seems to do the job wonderfully.It was super easy to install, just screw off the two screws holding the battery pack in, pull out the old battery, place this one in, and screw the battery cover back on.

It's a battery. It was easy to install in my Roomba, with just a screwdriver The price was right. If you need one, just buy this. I couldn't find it anywhere else cheaper. Just make sure you get the right battery for your Roomba model, there are a number of different batteries that fit various models.Now I have to find a place to dispose of the old battery.

After replacing the battery, which is as easy as removing 5 screws and the new battery slides right in my Roomba is running as strong as it did when it was brand new. Battery was well protected in the packaging and packaging was easy to open, even came with 2 new brushes for free!

This came SO fast. It installed easily (although it looks a little different then the Roomba brand). After the initial charge, it powered the Roomba to clean like crazy for over an hour on one charge. The price was great as well. If your Roomba is not holding a charge, don't hesitate, go for this one. The company is very customer-centric as well.

I was so happy to have my Roomba working again. I replaced the battery before from the company and it was so expensive I had decideddonate my machine to the Goodwill. I saw this battery, ordered and walla... it works. This was half the price of the last battery I purchased. I recommend this seller and this product. As I recall my model number is 536.

Works great, restored my Roomba 520 to full working order. He can now clean about 4 rooms on one charge.Update December 2017: 4 years later and this battery is still going strong!