This is the replacement battery for the Luba 2 and LUBA 2X 10000.  This battery is 21.6v 15Ah.

Part Number: W.D.BT.0000.2000Y

Compatible With: Mammotion Luba 1, Mammotion Luba 2, Mammotion Luba 2 AWD, Mammotion Luba 2X