Super Extended 3800mAh Battery 2-Pack for Neato XV Series 2 Rechargeable Extended Long Lasting Batteries for neato XV series 3800mAh 7.2V Ni-MH 27.36Whr; higher capacity but same voltage as neato designed. Neato xv-11 xv-12 xv-15 xv-21 xv-25 Signature XV Pro VR100 All Ni-MH batteries' capacity( run time) will gradually increase to peak after first several charge and discharge cycles. Six (6) month limited manufacturers warranty included. These batteries have higher capacity but same voltage as neato designed, they will NOT hurt neato. You can call or text 512-827-8226 to get customer support from Value Sourcing LLC.