REPAIR GUIDE · OCTOBER 2026
Roomba battery replacement, generation by generation
A Roomba that runs out early, won't charge or never gets back to its base can look like it needs a new battery. Before you order one, check the things a new pack can't fix: a dirty contact, a dock without power, a charging temperature error. This guide covers those checks, how to identify the pack your exact robot uses, and what iRobot documents about taking it out and putting it back on different models.
Diagnose first
Start with what the robot actually does. If it doesn't reach the base, circles it or can't line up, work through Roomba not docking. If it sits properly on the base but shows no sign of charging, go to Roomba not charging, which covers dock power, contacts, charging errors and the model-specific steps iRobot gives for robots that won't wake. A new iRobot lithium-ion battery has to be woken on the base, so a fresh pack that seems dead may just need docking.
Two more checks belong before a purchase. Charging errors 6 and 7 mean the robot is too hot or too cold to charge; iRobot's guidance for those errors suggests a room around 60–75°F (15.5–23°C) and letting a cold robot warm up away from heat sources. For short runtime on a full charge, iRobot's runtime article first rules out incomplete charging, errors, cleaning coverage and software, then describes a test: full charge, base unplugged and moved away, hard floor. Runs on carpet are shorter, so stopping sooner on carpet doesn't prove the pack is worn. If the battery still looks like the cause after all that, read on.
Rule out the rest
Docking, dock power, contacts, charging errors and a fair runtime test.
Identify robot and pack
Exact model and serial, plus the part number and chemistry on the old pack label.
Confirm the fit
An iRobot listing or support answer that names your robot, in your region.
Which battery your robot shipped with
iRobot article 21019 lists batteries by robot SKU. Some rows give the pack a robot left the factory with; others are compatibility listings, and the two shouldn't be read as the same thing. In the 600 and 800 compatibility tables, iRobot marks some alternatives: one asterisk for possibly shorter runtime, two for being able to complete several cleaning jobs before the robot needs to charge, three for possible charging problems. In the older 700 table, a single asterisk flags possible charging issues. Those marks are part of the answer, so read them alongside the part number.
| Robot (exact SKU or listed models) | Pack part | Chemistry and capacity | What the row means |
|---|---|---|---|
| R614020, R675020, R690020 | 4502233 | Li-ion, 1800/2130 mAh | Original factory pack. Doesn't vouch for any retail 600 battery sold today. |
| Roomba 694 | Not confirmed | Unknown | Not in this table. Ask iRobot, giving the serial number. |
| R890020, R891020, R960020, R980020 | 4502233 | Li-ion, 1800/2130 mAh | Original factory pack. For R890020/R891020, iRobot's 800 table lists compatibility columns, with e/i (4624864) marked Not Compatible. The 900 table lists only the original pack for R960020/R980020. Similar capacity elsewhere doesn't confirm fit. |
| R985020 | 4462425 | Li-ion, 3300 mAh | Original factory pack; differs from the other 900 rows. |
| e513420, e611220, i315020, i655020, i715020 | 4624864 | Li-ion, 1800 mAh | Original factory pack. Not every i model; i1 and i5 aren't assigned a pack here. |
| i415020, i855020 | 4706313 | Li-ion, 2210 mAh | Original factory pack, different from the 1800 mAh e/i pack. |
| j6/j6+, j7/j7+ (vacuum), Combo j5/j5+, i4/i8, Combo i5/i5+ | 4706313 | Li-ion, 2210 mAh | Compatibility listing. Doesn't extend to Combo j7+. |
| Combo j7+, j8+, j9/j9+, Combo j9+, Combo 10 Max (as iRobot lists them) | 4785636 or 4844236 | Li-ion, 4460 mAh | Compatibility listing. iRobot doesn't explain the two part numbers, so don't assume either swaps for the other. |
| s series | 4650994 | Li-ion, 3300 mAh | Matching 3300 mAh elsewhere doesn't make another pack equivalent. |
| Essentials Q012020, Y014020, Q052020, Y051042 | Not given | Li-ion, 2600 mAh | Wired, Essentials-only design; e/i packs don't fit. |
| Roomba 100/1000 and 200/2000 | Not given | LFP, 3000 mAh each | Different shapes; iRobot says they aren't interchangeable. |
| Plus 400, Plus 500, Max 700 Vac, Max 700 Combo | Not given | LFP, 5000 / 5000 / 5000 / 6000 mAh | Max 700 is a separate family from the old 700 series. |
| Older 500 and 700 series | 80501 | NiMH, 3000 mAh | The 700 table flags possible charging issues with some Li-ion substitutes. |
Batteries listed in iRobot article 21019, checked October 7, 2026. Capacities are iRobot's figures; voltage is not listed.
Labels settle more than series names. Read the exact model and serial on the robot, then the part number and chemistry printed on the battery you take out. If the old label and a new pack's label disagree, that isn't automatically a mismatch, because iRobot has replaced several part numbers over time. It does mean you need iRobot to confirm the new part is an authorized substitute for your robot.
Before buying a replacement
What's on sale now is a separate question from what shipped in the robot. When we read the official product pages on October 7, 2026, several were out of stock, had moved to a new part number, or described their fit inconsistently. Nothing in this table is a recommendation to buy.
| Listing | Region and stock that day | What the page says | What to do with it |
|---|---|---|---|
| 4854069 | US, out of stock | Li-ion for e/i/j robots. The top section excludes j9+ and Combo j7+/j9+/10 Max; Details excludes i8 and all Combo. Only height and width (4.35 × 9 cm) are given. | Don't use it for i8, j9+ or any Combo. Old US links for 4624864 and 4706313 now redirect here; a redirect doesn't confirm fit for your robot. Check other models with iRobot. |
| 4624864 | Spain, selected retail outlets | Li-ion for e/i vacuums; excludes i8 and Combo. | Applies to the Spanish store; it says nothing about US stock. |
| 4706313 | UK, out of stock | 2210 mAh Li-ion. The top section mentions Combo j; Details names only j vacuums. | Don't read the broad heading as fit for Combo j7+. |
| 4636434 XLife | US, out of stock | Lists 618, 620, 630, 635, 645, 650, 655, 660, plus 500, 700, 870, 880. No capacity, voltage or connector data. | 614, 675 and 690 aren't listed. It's a different SKU from factory X-Life 4419696; the sources don't show them as equivalent, so don't borrow that pack's specs. |
Official replacement listings as read on October 7, 2026. Stock and fit can change; confirm before ordering.
Two figures on these pages are easy to misread. The retail box size on the 4854069 page is the packaging, not the battery. And the XLife page talks about more charge cycles, not longer runs; it says runtime per charge stays the same.
Confirm all of these before ordering
- Exact robot model and serial number, read from the robot.
- Part number and chemistry on the old pack (Li-ion, LFP or NiMH).
- An iRobot listing or support answer that names your exact robot, with no conflicting exclusions on the same page.
- How the pack is held (latches, a retaining screw, a door or bottom plate) and its connector, compared with your model's official instructions.
- That the listing is for your region and in stock, not redirected to another part.
- The sources checked for this guide don't publish voltage, polarity or pin layout for these packs, or a common connector standard. Don't fill the gap by guessing, and don't treat matching voltage, capacity or shape as proof of fit.
- If anything doesn't match or can't be confirmed, stop and ask iRobot before buying.
Removing and refitting the battery
Access varies by model, so use the official instructions for your exact robot. iRobot article 2457 documents the differences below. Before touching a screw, power the robot down, take it off the base and put it on a clean, flat surface. Use the screwdriver your model's instructions name; no single size covers every generation.
| Model | How the battery is reached | Watch for |
|---|---|---|
| Roomba 100/1000 | Battery door, two small screws | Small black wire connector; seated wrong, the door may not close. |
| Roomba 200/2000 | Battery door, three small screws | Same small black connector and door check. |
| Plus 400/405, Plus 500/505 | Bottom plate, nine screws | Not the same as the 410/510/575 door. |
| Plus 410, 510, 575 | Battery door, four screws | Small black connector. |
| Max 700 Vac / Max 700 Combo | Bottom plate, six screws (Vac) or nine (Combo) | Screw counts differ between the two. |
| Mini | Battery door, four screws | Follow the Mini instructions. |
| Older e/i (4624864 page) | Bottom plate, five screws | Pack held by latches; release them rather than pulling. |
| Newer i1, i3, i5, Combo i5 | May have a battery door instead of the older bottom plate | Check which version you have. |
| Combo j series | Four bottom-plate screws plus one side-brush screw | The side brush comes off first. |
| s9 | Bottom access plus an extra battery-retaining screw | Remove that screw before lifting the pack. |
| Essentials | iRobot suggests sleep/ship mode before removing the battery | The 9-second HOME step is for Essentials only. |
Documented access differences, from iRobot article 2457 and the Spanish 4624864 page.
Photograph the pack in place first. Then, in the order your model's guide gives, remove any retaining screw, release the latches and unplug the wire connector where there is one. Only then lift the pack, holding its body and never the wires. If something won't come free, recheck the guide instead of pulling harder. Don't shave the casing, bend contacts, adapt a connector or press a pack into a space it doesn't fit.
Original, authorized or third-party
The j7+ manual tells owners to replace the battery with the same iRobot battery or ask iRobot about replacement options. That gives you something you can verify: the original part, or a substitute iRobot names for your robot. We have no test data on third-party packs and make no claims about their fit, protection or lifespan. A seller saying a pack matches on voltage, capacity or looks doesn't show it will fit, connect and charge correctly in your Roomba. Without a confirmation that names your model, treat the fit as unknown.
When to stop
After the swap
Compare the pack with your photo, check that the connector is fully seated on models that have one, and make sure the door or plate closes flush with every screw back in. Then put the robot on its base, where a new lithium-ion pack wakes up, and watch for your model's charging signal. On the j7+, the manual shows a white spiral on the light ring while charging and a red spiral when the battery is low and charging. Other models signal differently.
This guide doesn't include a forced full discharge as a replacement step. If your exact model's official instructions call for something after a battery change, follow them. The runtime test in iRobot's article is a diagnostic, not a calibration routine, so use it later if you want to judge runtime fairly. If the robot won't charge on the new battery, go back to Roomba not charging; dock power, contacts and charging errors affect a new pack the same way they affected the old one.
Sources
Read October 7, 2026: iRobot 21019, battery compatibility; iRobot 2457, battery removal; iRobot 19952, not charging or powering on; iRobot 2440, charging errors 6 and 7; iRobot 31269, short runtime; Roomba j7+ owner's manual; product pages for 4854069, 4624864 (Spain), 4706313 (UK) and 4636434 XLife.