The Xiaomi Vacuum Cleaner G9/G10 Extended Battery Pack allows you to keep an additional battery charging while you clean. It comes with an expansion dock that can help to charge and store the replacement battery. Once the expansion dock is placed on the charging dock, the cleaner and replacement battery can be charged at the same time with one cable. Compatible with both the G9 and G10 Xiaomi Vacuums, it can provide up to 65 mins extra working time for the G10 and up to 75 mins of extra working time for the G9 in Eco mode.