14.4v NICD 2000MAH Replacement Battery for Roomba 400 Series

$29.99

Vacuum Battery For iRobot Roomba 4000 Discovery / Dirt Dog

Name: Vacuum Battery For iRobot Roomba 4000 Discovery / Dirt Dog
SKU: ML-RMB4009
Availability: InStock

Multi Packs Bundled Savings

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SKU: ML-RMB4009 Category: Vacuum

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		$ 48.99
		$ 29.99

The ML-RMB400 Replacement Battery by Mighty Max is Designed for for iRobot Roomba APS 400 Series, Its an Ni-Cd Rechargeable battery that keeps Roomba running at peak performance, cleaning up your room in a single charge. ML-RMB400 can be charged or discharged as needed without loss of capacity.

The ML-RMB400 battery is fully compatible with all Roomba FloorVac models: iRobot Roomba 400 Series, Discovery Series, Create Models and Dirt Dog Models.

Battery Specifications:

Voltage: 14.4V

Amperage: 2000mAh

Chemistry: Ni-Cd

Warranty: 1 Year

Multi Packs Bundled Savings	1 Pack, 2 Pack
Width	2.00
Length	7.00
Warranty	1 Year
Quantity	1
Chemistry	NiCd
Amp Hour	2000mAh
Volts	14.4v
Height	2.00
Weight	2.00 Lbs

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Mighty Max Battery

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Manny Jaramillo

Battery arrived in a good shape package strait to my door steps

Robin Lauer

Arrived just in time to power my generator here in the cold Maine winters. Excellent service!

Shutter Dog Homestead

Arrived quickly from WALMART.COM. Perfect size and proper placement in my generator. Installation was easy. Generator fired right up. Battery came fully charged.

Larry Geiger

New battery. Ready for cold weather!

Harmon Chandler

So far these Might Max batteries are good but it’s only the first day and they were on charge for 12 hrs. I’ll have to come back and do an update at some point in time. Ordered them on Amazon and got them the next day. I was encouraged by Mighty Max to make this google review and post pictures to extend my warranty for 3 months but there is no way to post pictures 🤣🤣🤣 It’s been a few months and I was able to go back and edit, so here is a video I made, the rest of the photos I have deleted. Batteries are still going strong. Update 12-11-2025

Carl Ruckinger

They arrived within 2 days of ordering them packaging was really good I haven't put them in my MX350 yet I hit them with my multi meter fresh out of the box and got 12.4v on both batteries so that is good