iRobot Rechargeable Battery 41151920, Replaces ion20 — Fixes Short Runtime & Charging Failures

The iRobot 41151920 Rechargeable Li-ion Battery is the genuine OEM replacement battery for select iRobot robotic vacuum models. It replaces ion20 when fitment is confirmed by the full robot model number. This part has been discontinued by iRobot and is no longer available through standard distribution channels. Confirm availability before ordering.

Is This the Right Part?

Confirm the complete model number before ordering. iRobot battery packs vary by voltage, cell chemistry, connector type, and physical dimensions. Do not order by part number alone.

Common Symptoms

• Robot vacuum runs for significantly less time than expected before stopping
• Battery does not hold a charge or drains immediately after charging
• Robot stops mid-clean and returns to dock prematurely
• Charging indicator shows error or battery fails to charge at all

Check Before Replacing

• Clean the charging contacts on both the robot and the dock — dirty contacts are a common cause of charging failures
• Test with a different power outlet and charging cable to rule out power supply issues
• Check for firmware updates — some battery and charging issues are resolved through software
• Confirm the battery is the correct voltage and connector type for your specific iRobot model before installing

Part Details

Installation Notes

1. Power off the robot and remove it from the charging dock before beginning.
2. Photograph the battery orientation, connector position, and any retaining clips before removal.
3. Compare the replacement battery with the original — confirm connector type, voltage, and physical dimensions match.
4. Inspect the battery compartment and contacts for corrosion or damage before installing the new battery.
5. After installation, fully charge the battery before first use and run a complete cleaning cycle to verify performance.

Li-ion batteries should be handled carefully — do not puncture, crush, or expose to extreme heat. Dispose of old batteries at an approved electronics recycling facility.

Verified Compatible Models

Model numbers not confirmed — contact us with your full iRobot model number to verify fitment before ordering.

Fitment reminder: Match the complete model number, including suffixes and revision digits, before ordering. This part is discontinued — confirm availability before purchase.