Powerextra Roomba 500-900 Series Replacement Battery
A simple fix for a Roomba that keeps docking too soon: this 4.0Ah 14.4V battery restores runtime across the entire 500 to 900 series lineup.
Characteristics
- Capacity: 4.0 Ah / 4000 mAh (14.4V, NiMH)
- Compatibility: Roomba 500, 600, 700, 800, and 900 series
- Install: Tool-free, bottom-mounted battery bay
- Type: Aftermarket replacement (not an OEM iRobot part)
- Restores 1 to 2 years of life to Roomba units over 5 years old
Detailed overview: Powerextra 4.0Ah 14.4V battery for iRobot Roomba
This Powerextra battery is a compatible replacement for the original NiMH pack fitted to iRobot's classic Roomba lineup, covering the 500, 600, 700, 800, and 900 series. That spans a wide range of specific models, including the 510, 550, 620, 650, 675, 690, 760, 770, 780, 860, 870, 890, 960, and 980, among others, all of which share the same battery bay and connector.
Rated capacity is 4.0 Ah (4000 mAh) at a nominal 14.4V, in line with the original battery these Roomba generations shipped with. As NiMH cells age past a few hundred charge cycles, capacity fades and the robot starts returning to its dock well before a room is finished, which is the most common reason an otherwise healthy Roomba starts underperforming.
Installation does not require any tools: the battery sits in a bay accessed from underneath the robot, held by a simple latch or cover depending on the exact model, the same location as the original pack. After swapping in the new battery, running the Roomba through one or two full charge and discharge cycles helps it recalibrate its internal runtime estimate, since the robot's charge indicator initially reflects the assumptions carried over from the old, degraded pack.
This battery is a compatible aftermarket replacement, not an original iRobot part, built to the same voltage and connector as the factory battery for the covered Roomba generations. Before ordering, check your specific model number against the compatibility list, since iRobot's newer i, j, and s series robots use a different battery format not covered by this pack.
Our tester's review: Yoni Marchal-Laporte
This Powerextra pack follows the same recipe as the brand's other Roomba batteries, and the pattern in owner reports is consistent: a straightforward swap that brings a sluggish or dock-happy Roomba back to something close to its original runtime, often for a fraction of the price of a new robot. Several owners mention units five years old or more getting a second life after the swap, sometimes running another year or two. The recurring complaint is a smaller share of packs that arrive with reduced capacity or a charge indicator that reads inaccurately for the first cycle or two, which usually settles down after a full charge and discharge. A handful of fitting issues trace back to buyers double-checking the wrong model number rather than a fault in the battery itself. Given the price against a new robot, this remains a sensible first fix for a Roomba that has started cutting its cleaning sessions short.
Frequently asked questions: Powerextra 4.0Ah 14.4V battery for iRobot Roomba
Check your Roomba's model number, printed on the underside of the robot, against the compatible series listed: 500, 600, 700, 800, and 900. iRobot's newer i, j, e, and s series robots use a different battery format that this pack does not fit.
Rated at 4.0 Ah and 14.4V, it is built close to the original Roomba specification. Running it through one or two full charge and discharge cycles after installation helps the robot's internal runtime estimate recalibrate.
No, it is a compatible aftermarket replacement built to the same voltage, capacity class, and connector as the factory NiMH pack. It is not sold or endorsed by iRobot.
No. The battery sits in a bay accessed from underneath the robot, in the same location as the original pack, and is held by a simple latch or cover rather than screws.
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