Specification: Voltage:14.4V Capatity: 2800mAh Warranty:30-day refund and 12-month warranty. Replacement for Part Number: CMICR18650F8M7-4S1P Compatible Models: Proscenic 850T 850P Neatsvor X500 X520 X600 Ultenic D5, D5S Pro Robot Vacuum Cleaner We have always been trying to provide the best service and reliable products for every customer.if you have any doubt,you can email us immediately. Battery Features: 1. The new battery cannot be charged, is there a problem with the battery? Usually not. The charges the battery for the first time. Due to the instability of voltage and current, the machine may stop charging the battery when the battery is half charged (sometimes more, sometimes less). If this happens, Don't worry, just take the battery out of the machine and recharge it again. The new battery charged for the first time may require several iterations. Don't worry, this is normal. 2. When the battery is in normal operation, if the battery is discharged to 3%, it must be shut down or recharged. If the battery is discharged to 0%, the battery will be damaged and its life will be attenuated. 3. Avoid falling, heating, and short-circuit, avoid using the baAvoid falling, heating, and short-circuit, avoid using the battery in an environment where the temperature is too high or too low.

?Give Customers the Best Benefit?:30 Days no-questions-asked full money back and 12 Months Exchange Guarantee. (The return window will be closed a month after you received the the product. CONTACT US, we will make it up and solve it more efficiently). We providing you 24/7 email service to support you with any problem, be rest assured that you will get the best when you choose our products. ?Safety Above All?Our batteries are certified by CE, FCC and RoHS to ensure your safety, and packed with prevention measures like short circuit, overheat and overcharge protection.Our batteries are made with premium materials and circuit boards to ensure performance and durability. ?Compatible with Part Number?Fit for CMICR18650F8M7-4S1P. ?Replacement For Models?Fit for Proscenic 850T 850P Neatsvor X500 X520 X600 Ultenic D5, D5S Pro Robot Vacuum Cleaner. ?Battery Specification?Capacity: 2800mAh Voltage: 14.4V.100% brand new. High-quality materials and circuit board.