Additional Details ------------------------------ Bullet point: ?Please make sure both the model number and battery part number match your device before purchasing (please refer to product description for related information). Product description: ?Cameron Sino Cameron Sino is a brand that focuses on selling batteries. Our goal is to provide high quality professional battery products. ?Customize Modeller: Robovac L70 Hybrid, T2190, T2190G21 ?Compatible Models: INR18650M26-4S2P ?Note before purchasing - Carefully check the model number of your device and the part number of your original battery to determine if this battery is compatible with your device. - A new battery will reach its best performance after 2 or 3 complete charge and discharge cycles. - When installing, make sure the plug is properly connected to your device. - Do not use inferior third-party adapter chargers to charge your device as it will reduce battery life. ?Contact us If you have any questions or problems when using our product, please send us a message, we will reply you as soon as possible.