Ecovacs Deebot CR120 Replacement Battery 14.4V 2000mAh

Ecovacs Deebot CR120 / X500 / KK-8 — 14.4V Ni-MH Replacement Battery (LP43SC2000P)

This is a 14.4V, 2000mAh Ni-MH replacement battery for the Ecovacs Deebot CR120 robotic vacuum. It also fits the X500, KK-8, and Deebot KK-8 variants that share the same battery bay and voltage rail. Capacity is 2000mAh (28.8Wh), matching the original specification.

• CR120, X500, and KK-8 platform fit: These models share the same 14.4V battery bay, connector housing, and BMS communication protocol. The LP43SC2000P slots into all of them without modification — same cell count, same terminal orientation, same charge handshake.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a CR120 unit. The BMS accepted the battery without fault codes, and the robot completed full cleaning cycles without mid-run shutdowns or low-voltage cutoff errors.
• Dock charging habit on robotic vacuums: Ni-MH cells in always-docked robots degrade faster than those cycled properly. After each full charge, run the Deebot until it returns to the dock on its own — don't leave it sitting charged and idle on the dock for days between uses.

Suction dropping before the battery indicator shows low on the CR120

The CR120 uses motor draw as the primary load on this battery. When the Ni-MH cells age, internal resistance rises — voltage sags under motor load even when the charge indicator still reads mid-range. The robot interprets this as a normal operating state and keeps running, but the motor isn't getting full voltage. Result: suction weakens noticeably while the indicator shows capacity remaining. A fresh LP43SC2000P cell with low internal resistance restores stable voltage under motor load and eliminates the sag.

Deebot CR120 cuts out mid-run and then recovers after a pause

This is a BMS overcurrent trip, not a dead battery. When the filter is partially blocked, the motor draws harder to maintain suction — sustained high current triggers the BMS protection circuit, which cuts power to prevent cell damage. After a short pause, the BMS resets and the robot powers back on. Before replacing the battery, remove and tap out the filter. If the cutouts stop, the filter was the cause. If they continue with a clean filter, the aging cells can no longer handle the motor's start-up current draw — replace the battery and verify stable voltage above 12V under load.