Rechargeable Lithium Ion Battery for Roborock Q7, S7, S6, S5, Mi Series Replacement of the batteries in your robot vacuum cleaner is probably the most common replacement you will ever need in a rechargeable product. So it is important to buy your battery from a trusted supplier committed to delivering only the highest grade battery cells. Don't compromise on quality. Choose the Hygiea brand Roborock batteries for the best grade battery cells. So you can be confident that you are getting a product that will perform and last as promised. Our products are tested to Australian electrical safety standards and are marked with the Australian C-Tick electrical safety mark, as found on products at retail stores in Australia. Battery Chemistry: Li-Ion Battery Capacity: 5200 mAh. Bulky items will attract extra cost. You can then decide to pay for the postage or cancel the order.