14.8V Rechargeable Li-ion Battery 6700mAh for Conga 4090, 4490, 4590, 4690,6700mAh Robot Vacuum Cleaner Plug & Play:Manufactured to work as genuine parts with the exact same plug and size, it fits in your robot vacuum and works just like the original. Easy to install in 2 minutes Safety & Reliability:Patented battery balancing technology, built-in over-charge, over-discharge, over-voltage, over-current, and over-temperature protection After Sales Service:For any question just let us know, we will do our best to solve the problem and will be replied within 24 hours 14.8V Rechargeable Li-ion Battery 6700mAh for Conga 4090, 4490, 4590, 4690,6700mAh Robot Vacuum Cleaner