Replacement or additional battery for Models RL-500,RL-550,RL-800,RL-850,RL-1000 and iMow. 18AH.
A second battery will increase your mowing capacity in time and area coverage. Identical to the original battery pack you got with your Robomower or IMow so it is a direct replacement. Use the external charger to charge one battery while you are mowing with the other (see related items below). Genuine Friendly Robotics product.