ETA 2218 9000 Ergo Replacement Battery 14.4V 2600mAh

ETA 2218 9000 Ergo — 14.4V Li-ion Replacement Battery (2420 0270)

This is a 14.4V, 2600mAh (37.44Wh) lithium-ion replacement battery for the ETA 2218 9000 Ergo cordless vacuum cleaner. It fits the 2218 Ergo and Ergo 2218 model variants that use OEM part 2420 0270. Slot it in and the vacuum operates as it did on the original cell.

• 2218 Ergo platform compatibility: The 2218, 2218 9000, and Ergo 2218 variants all run the same 14.4V rail and use the same battery housing and connector. No rewiring or adapter needed — the BMS handshake between charger and pack is identical across these variants.
• Bench tested on actual hardware: We cycled this pack through the 2218 9000 Ergo's charge-discharge sequence. The BMS held cut-off within spec under sustained motor load, and the charger accepted the handshake without faults on a full charge cycle.
• Dock charging habit on the Ergo 2218: Do not leave this vacuum sitting on the charging dock between uses. Continuous trickle charging on lithium cells accelerates capacity fade faster than normal cycle wear. Charge fully, then pull it from the dock until the next use.

Suction dropping before the battery indicator reaches low

This happens when the motor is pulling more current than rated — usually because a partially blocked filter forces it to work harder to maintain airflow. The increased draw causes voltage sag in the pack before the indicator circuit reads low, so the vacuum feels weak while the light still shows adequate charge. The BMS protects the cells by reducing output when the load spikes, which reads as lost suction. Clean or replace the filter first, then retest — most users find suction restores immediately.

Motor cutting out mid-clean and recovering after a pause

This is a BMS overcurrent trip, not a failed battery. When restricted airflow — from a clogged filter or blocked nozzle — pushes motor draw past the pack's continuous current limit, the BMS shuts output to protect the cells. After a short pause, the BMS resets and the motor restarts. The fix is clearing the blockage before the next run, not replacing the battery. Check the filter and the nozzle channel, then confirm the motor runs continuously at 14.4V without cutting out.