Amazon.com: HQRP 4500mAh Extra High Capacity Battery 2Pack Compatible with Neato XV-11 XV-15 XV-25 XV-21 XV-14 XV-12 XV Signature Pro All-Floor Robotic Vacuum Super Extended Life : Industrial & Scientific
Powerextra AZDS599 7.2V 4000mAh Battery Compatible with Neato XV-11 XV-12 XV-14 XV-15 XV-21 XV-25, XV Essential, XV Signature Pro Robotic Vacuum