It’s as well we post every little issue we have even though it’s rectified itself as it stopped us worrying about it if it happens again so it will likely put other owners minds at rest. Up to now I have been absolutely delighted with it. I may have chosen the wrong cells in Samsung 35E as the seem very temperature sensitive compared to my original Bosch battery. In the cold the Bosch 300Wh out performs the Infinite 560Wh in power delivery but the Infinite powers ahead in warm weather. The Samsung 35E cells recover when I bring the battery into the warm. Eg the software will show a say 65% charge left just after the ride but four hours later having warmed up it will then show 76% charge and the battery led light will go from 3 lights to 4. The Bosch has never done that to such an extent. Yes range is reduced in cold weather but not to that extent. I suspect Bosch use a cell more suited to this use. I only went for the 35E on their reputation and extra capacity but I suspect there are far better cells suitable for this task. Solution? I do use a USB heat mat powered by a USB power pack on both batteries but the Samsung cells don’t respond as well as those in the Bosch. If I am going to exceed 45 miles in very cold weather I take both batteries. I would love to get hold of whatever cells Bosch use for the Infinite.