Specifications Hign-concerned Chemical:None Nominal Capacity:>3500mAh Model Number:P1904-4S1P-MM Type:Li-Ion Origin:Mainland China Certification:CE The main image is for reference only. The article comes in different versions. Please carefully review and select the corresponding image window to order. thanks Battery model: 1C P1904-4S1P-mm Battery capacity: 5200 mAh, 6500 mAh, 9800 mAh,12800 mAh Voltage limit: 14.4V Compatibility: Xiaomi Mijia Mi vacuum cleaner for Dweilen G1 robot battery cleaning Country of origin of battery: China Packaging specification: Volume packaging (bubble envelope) Important note: The new lithium-ion battery needs to be fully charged and fully charged 2-3 times before fully air conditioning. Please remember that the complete performance and lifespan of new lithium-ion batteries can only be achieved after 2-3 complete charging and discharging cycles. Once you have completed 2-3 cycles, you will never be able to tolerate the battery again According to the operator's network settings, signal power, and selected functions, call time and call time are approximate values. The call time and standby time will be lower than the simulation mode mentioned above. Dear customers and friends When you buy my product. If something unusual happens: do not receive products, they do not meet the description, or for other reasons, you are not satisfied. Please write to me for neutral (or negative) comments or to easily open the lid. We will do our best to solve your problem. I believe that good communication can solve the problem. Attention: Light shooting and other displays may cause the color of the object in the image to slightly differ from the actual object. The measurement error is+ -1-3 centimeters.