Powerextra 22.2v 1500mAh Battery Compatible with Dyson DC31 DC35(except DC31 DC35 type B) DC35 Multi Floor Hand Vacuum Cleaners Replacement Safeguard features against incorrect voltage, short circuit, internal overheating. Integrated microchip prevents overcharging & lengthens battery life Fully compatible with your power tools all our products WILL NOT VOID your manufacturer warranty Li-on battery, 1.5Ah Capacity, 22.2V made with high quality LG 18650 cells 30 Days Money Back 12 Months Limited Guarantee!