Odec Battery Compatible with Dyson DC31 Vacuum Cleaner, 22.2V 2000mAh Replacement Battery Voltage: 22.3V; Capacity: 2Ah; Color: Black; Materials: 6 18650 cells. Fit for Dyson DC31 DC34 DC35 917083-01 Vacuum Cleaner(NOT fit for Dyson DC31, DC35, DC44, DC45 Type B series, DC44 MK2) Upgraded 2000mAh ultra high capacity give a lot of power for the vacuum cleaner to run longer No memory effect, can be charged or discharged as needed without loss of capacity CE and FCC certified, passed vibration, heating, high temperature test Built-in microchip prevent the battery from over-charge or over-discharge