About the 90min runtime: Dreame T30 vacuum cleaner provides 90 minutes of cleaning time when using the 2-in-1 brush nozzle or soft dusting brush in Eco mode (Ideal test in the laboratory) It may have some differences in usage scenarios. You can also buy an extra battery for the longer cleaning. Model Number: T30 Vacuum Part Type: Replacement Batteries Type: Vacuum Cleaner Parts Compatibility: For Dreame T30 Vacuum Cleaner Battery Type: Rechargeable Removable Battery Power Source Type: Handheld Wireless Cordless Where To Use: For Home Appliance Battery Capacity: 29.6V 2900mah Battery Runtime: 90min In ECO Model Charging Time:
