iRobot Vacuum Batteries

iRobot Vacuum Batteries: What to Know Before You Buy

iRobot batteries keep Roomba and other iRobot cleaners running through full cleaning cycles. Choosing a compatible pack and caring for it properly can add months of useful life and more consistent run time.

Compatibility at a Glance

Use only the battery type designed for your robot. Mixing chemistries or using an incorrect pack can damage the robot or reduce performance.

• Older Roomba series (e.g., many 500–800 models): commonly shipped with NiMH packs. Some variants use Li-ion. Check the label under the bin or in the app/manual.
• Newer Roomba series (e.g., many 900, e, i, j, s): typically use Li-ion packs designed for that series.
• Always verify by model number and the battery’s part label before purchase. If unsure, consult the robot’s manual or the manufacturer’s support page.

Typical Run Time Ranges

Actual run time varies with floor type, cleaning mode, brush condition, and battery age.

Series (typical)	Battery chemistry	Expected run time (new battery)
500–800	NiMH or Li-ion (model-dependent)	60–120 minutes
900, e, i	Li-ion	75–120 minutes
j, s	Li-ion	90–180 minutes

Note: Mapping features, high-suction modes, and thick carpets reduce run time.

When to Replace Your Battery

• Run time drops noticeably (e.g., from ~90 minutes to <30–40 minutes) after a full charge.
• The robot ends jobs early or returns to dock more often than it used to.
• Charging completes unusually fast or takes much longer than normal.
• Battery is over 2–4 years old or has >300–500 charge cycles (typical Li-ion lifetime range).
• Visible swelling, leaks, or overheating during charge (replace immediately and stop use).

How to Choose the Right Replacement

• Match by model and chemistry: Use the same battery type your robot specifies (NiMH vs Li-ion).
• Capacity (mAh): Higher capacity can extend run time if it’s an approved pack for your model.
• Fit and connectors: The pack should match the original size and connector style.
• Certification and quality: Prefer OEM or reputable third-party packs with safety certifications.

Battery Care for Longer Life

• Keep on the dock when not in use; avoid storing fully drained.
• Avoid heat: Do not charge or store near radiators, in direct sun, or in hot garages.
• Clean robot brushes, bearings, and filters every 1–2 weeks to reduce power draw.
• Wipe charging contacts on the robot and dock monthly to maintain a solid connection.
• Long-term storage (1+ month): Power off (if supported) and store around 40–60% charge in a cool, dry place; top up every 2–3 months.

Charging and Calibration Tips

• Use the official dock/charger to prevent under- or overcharging.
• Let the robot cool for ~30 minutes after a long run before charging.
• Li-ion: Avoid frequent deep discharges; partial charges are fine.
• NiMH: Some models benefit from an occasional full run-to-empty and recharge to keep the gauge accurate—follow your manual’s guidance.

DIY Replacement: Quick Steps (5–10 minutes)

1. Power off the robot, remove the dust bin, and flip the robot over on a soft surface.
2. Remove the battery door (usually 2 screws). Keep screws safe.
3. Lift out the old battery by the tabs. Avoid pulling on wires.
4. Insert the new pack, aligning contacts and tabs.
5. Reinstall the battery door and screws. Do not overtighten.
6. Dock the robot and allow a full charge cycle before the first run.

Troubleshooting After Replacement

• Robot won’t power on: Reseat the battery and verify contact alignment; check the battery door is fully closed.
• Short run time on first use: Complete 2–3 full charge cycles to stabilize capacity.
• Charging errors: Clean contacts, try a different outlet, and ensure the dock power light is on.
• App shows incorrect charge: Perform the manufacturer’s battery gauge calibration if available.

Safety and Recycling

• Do not puncture, crush, or disassemble the pack.
• Stop using any battery that is hot to the touch, swollen, leaking, or emitting odor.
• Recycle through local e‑waste programs or battery recycling services—do not dispose in household trash.

FAQ

Can I upgrade from NiMH to Li-ion?

Only if the specific model supports a Li-ion pack designed for it. Never mix chemistries or modify connectors. Check your manual for approved battery types.

Should I leave the robot on the dock?

Yes. For most models, leaving the robot on the dock maintains readiness and reduces deep discharges that can shorten battery life.

How long should a new battery last?

Many users see 1.5–3 years of typical use, depending on cleaning frequency, environment, and care. Heavy daily use will age the pack faster.

Why did my run time drop suddenly?

Clogged brushes/filters, high-suction modes, thick carpets, or battery age can reduce run time. Clean the robot and check the battery’s age and charge cycles.

Are third-party batteries safe?

Choose reputable brands that specify compatibility and carry safety certifications. When in doubt, use an OEM battery to ensure fit and charging behavior.