OHYES BAT 22.2V 2.0Ah Li-ION Replacement Battery for Dyson DC31 DC34 LI-ION battery, 2Ah,22.2V, made with high quality cells Fully compatible with your power tools The spring-loading mechanism makes this battery easy to install and remove from your tool. Can be charged or discharged as needed without loss of capacity. OHYES battery enjoys 30 Days Money Back and 12 Months Guarantee!