Replacement 2000mAh Lithium‑Ion Battery for Roomba 400 Series Key benefits Lasts through full cleaning cycles: The 2000mAh capacity battery provides reliable runtime so your Roomba can finish wholehouse cleaning without stopping to recharge midtask. Restores cleaning performance: Replacing a worn or weak battery returns predictable runtime and consistent suction performance, reducing interrupted cleaning sessions. Ready when you need it: Low selfdischarge and quality cells keep the battery charged longer during idle periods so the vacuum is ready for scheduled or ondemand cleaning. What makes it stand out lithium‑ion cells: Built with performance cells that offer extended cycle life and stable output for dependable everyday use. Smart protection built in: A multilayered protection system with a smart protection chip guards against overcharging, overdischarging, and short circuits for safe charging and operation. Designed for seamless fit: Engineered to match the standard form factor and electrical requirements for Roomba 400 series machines to ensure straightforward installation and reliable contact. Features and specifications Capacity: 2000mAh capacity battery Chemistry: Lithium‑ion cells with low selfdischarge and extended cycle life Safety: Builtin smart protection chip to prevent overcharge, overdischarge, and short circuits Function: Replacement battery for routine or emergency swaps to restore run time and performance Compatibility Compatible For Roomba 400 series models, including 4000, 4100, 4105, 4110, 4130, 4188, 4210, 4220, 400, 405, 410, 415, 416, 418, and dozens of other models. Designed to work with the electrical and physical specifications of Roomba 400 series units. Practical use scenarios Large home cleaning: a weak battery so your robot can complete a singlepass cleaning of multiple rooms or an entire floor without returning to the dock for a midcycle charge. Routine maintenance: Swap in a fresh battery during periodic maintenance to keep scheduled cleanings reliable and avoid unexpected early shutdowns. Backup for heavy use: Keep a spare battery on hand in households with pets or foot traffic to maintain cleaning coverage during busy weeks. Why choose this battery Straightforward plugin replacement that restores original run time expectations quality cells and integrated protections for safe, consistent performance Explicit compatibility with Roomba 400 series models to minimize fitment concerns Installation and care tips Follow your Roomba manufacturer instructions for battery replacement and disposal. Charge the battery fully before first use. Store in a cool, dry place when not in use to optimize longevity. This battery provides a practical, safe, and compatible replacement option to extend the usable life and reliability of Roomba 400 series vacuums.