Replace Vacuum Cleaner Battery for Dyson DC31 DC34 DC35 Type B by INNO-POWER 22.2v Type B battery for DYSON DC44/45 HANDHELD CORDLESS VACUUM 2200mAh Battery for Dyson DC31 DC35 DC44 DC45 Type B series 2 Highest quality standards,Integrated microchip prevents overcharging & lengthens battery life. GUARANTEE:3 months