14.4v NICD 2000MAH Replacement Battery for Roomba 500 Series
14.4v NICD 2000MAH Replacement Battery for Roomba 500 Series
14.4v NICD 2000MAH Replacement Battery for Roomba 500 Series
14.4v NICD 2000MAH Replacement Battery for Roomba 500 Series
14.4v NICD 2000MAH Replacement Battery for Roomba 500 Series
  1. 14.4v NICD 2000MAH Replacement Battery for Roomba 500 Series
  2. 14.4v NICD 2000MAH Replacement Battery for Roomba 500 Series
  3. 14.4v NICD 2000MAH Replacement Battery for Roomba 500 Series
  4. 14.4v NICD 2000MAH Replacement Battery for Roomba 500 Series
  5. 14.4v NICD 2000MAH Replacement Battery for Roomba 500 Series
Rated 5.00 out of 5 based on 11 customer ratings
(11 customer reviews)

$29.99

14.4v NiCD Battery Replacement for iRobot Roomba 563, 561, 551

Availability: In stock

SKU: ML-RMB50027 Category:
The ML-RMB500 battery is fully compatible with all Roomba 500, 600, and 700 series. Mighty Max ML-RMB500 Brand new Battery Pack which is compatible with iRobot Roomba Advanced Power System (APS) Battery.  ML-RMB500 replaces the original iRobot Roomba 80501 battery 
ML-RMB500 is an Ni-Cd Rechargeable battery that keeps Roomba running at peak performance, cleaning up your room in a single charge.  ML-RMB500 can be charged or discharged as needed without loss of capacity.
Battery Specifications:
Voltage: 14.4V
Amperage: 2.0AH
Chemistry: Ni-Cd
Warranty: 1 Year
Excellent
Mighty Max Battery
4.8
Based on 1501 reviews
See all reviews
D. Mac
I ordered the battery on March 30th, and it arrived on April 2nd in very good condition. The initial voltage check was 13.14 volts right out of the box. I installed it in a Harley motorcycle.The bike started very well and the battery fits perfectly in the designed location. After hooking up a trickle charger, it transitioned from charging to maintaining in less than a minute. I am very satisfied with my purchase.
David Rohrer
Well packaged
Toby Juarz
The batteries arrived quickly and very well packaged. One was installed in my Kawasaki KLR and fit perfectly. The battery was fully charged and I am a happy camper.
noel dickie
No fuss
Competitive price
Timely delivery
Barbara Brennan
Purchased 27 Mar 2025 to replace previous FIOS backup battery. Previous battery (Not a Mighty Max) was purchased 6 Jun 2018 and was replaced 2 April 2025. WHOA! Almost 7 yrs worth of service out of that battery! I might have squeaked it out to the year by resetting the beeping battery.

I’ll be interested to see how well this Might Max battery performs in comparison. this is my first purchase of this battery brand.

It was delivered well packaged and was easily installed with perfect fit to the FIOS backup box. Sorry, no action shot of installation as the directions for added 2nd additional 3 months warranty extension didn’t reveal until registering the product with the company. MMB might want to include that info nugget in the actual delivery box!

BLB in MD
Captain Croley
Purchased from EBay online. Price was easy on my wallet. Was very surprised to see the FedEx van pulling up my drive only 3 days after placing my order! Battery was packaged nicely to the battery could not move inside the shipping box. Headed out to the shop right now to install, and try it out in my KTM 450 EXC. Thank you Mighty Max 👍🏻
John Riley
Perfect match to my old battery. Arrived very quickly.
Luis Dominguez
The battery on my outdoor/party speaker stopped working so I found this place to order a new battery. Great service with fast shipping and looks like a great product. I installed the battery and put it to work right away. it's been working flawlessly.
Daniel Ryan
Mighty Max Battery has always provided great quality batteries for my business!

I rebuild UPS power supplies and automobile jump start boxes, and they always work perfectly. I will always buy Mighty Max!

(It would be REALLY nice if Mighty Max decided to send me some coupons or something since I buy so many batteries! 😇)
Alvin madison
Great product
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