Acconic 3300mAh Battery Compatible with iRobot Roomba 400 Series

Acconic 3300 mAh Replacement Battery for Roomba 400 Series — up to 150 minutes of cleaning againCompatible with Roomba 400 / 4000 Series · built-in protection electronics✓ Fits like the original🔋 3300 mAh — ~120–150 min runtime🛡️ Heat, overcharge & short-circuit protection🇨🇭 Swiss stockWhen a Roomba 400 parks itself in the middle of the kitchen with an empty light instead of finishing its round, the robot is fine — the battery cells have reached the end of their life. This Acconic replacement battery gives the robot its stamina back: 3300 mAh capacity for around 120–150 minutes of cleaning per charge (depending on mode), brand cells, and built-in protection electronics against heat, overcharging and short circuits. It charges as usual in the robot on the original charger.The 400 Series has been cleaning floors for years — retiring it over a worn battery would be a waste. A fresh battery costs a fraction of a new robot, restores day-one runtimes and keeps a working machine out of the landfill. The swap takes minutes: release the old pack, slide the new one in until it clicks. Checked before dispatch, 60-day return unopened, friendly email support from Switzerland.Free dispatch from our Swiss warehouse — delivery on the next working day (at the latest the 2nd).Technical dataPropertyValueCapacity3300 mAhVoltage14.4 VRuntime~120–150 minutes depending on cleaning modeProtectionBuilt-in heat, overcharge and short-circuit protectionChargingCharges in the robot with the original charger — full charge approx. 3–4 hoursCompatible vacuum models✓ iRobot Roomba 400 · 405 · 410✓ Roomba 415 · 416 · 418✓ Roomba 4000 · 4100 · 4105✓ Roomba 4110 · 4130⚠️ For the Roomba 400 / 4000 family only — other Roomba generations use a different battery format. Check your model number (on the underside of the robot) before ordering.Installation in 4 stepsSwitch the robot off and turn it over.Press the release and take the old battery out of the compartment.Slide the Acconic battery in until it audibly clicks into place.Charge fully once before the first run — done.Battery careGetting the longest life from the batteryCharge the battery fully before first use — it conditions itself over the first 2–3 charge cycles. Avoid leaving it at 0% for weeks; for longer storage, store it around half charged in a cool, dry place. Keep the contacts clean and dry.Normal behaviour after the swapThe first 2–3 charge cycles can show slightly shorter runtime while the cells settle — this is normal for lithium-ion batteries and evens out by itself. Topping up between runs is harmless: lithium-ion cells have no memory effect.Disposing of the old battery correctlyLithium batteries never belong in household waste. In Switzerland you can return the old battery free of charge at any sales point or communal collection site (battery return is prepaid by law).TroubleshootingSymptomSolutionRobot does not start after the swapCheck that the battery is pushed in fully and has clicked into place; charge fully once.Runtime shorter than expectedThe first 2–3 charge cycles can show shorter runtime while the cells settle. Carpets also drain any battery faster — compare after 2–3 full cycles.Battery does not chargeWipe the charging contacts on robot and charger with a dry cloth and check the charge indicator; contact our support if it stays dark.Frequently asked questionsCan I keep using my original iRobot charger?Yes. The battery charges in the robot with the original charger — nothing about your charging routine changes.Do I need special tools?No — the battery pack releases and clicks back in by hand in a few minutes.Is the battery safe?The built-in protection electronics guard against overheating, overcharging and short circuits — the same protection principle as in the original battery.How fast is delivery?Free dispatch from our Swiss warehouse — delivery on the next working day, at the latest the 2nd.✓ Checked before dispatch · 60-day return unopened · friendly email support from Switzerland